CN113170923A - Electronic cigarette tobacco tar detection method and system - Google Patents
Electronic cigarette tobacco tar detection method and system Download PDFInfo
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- CN113170923A CN113170923A CN202110537338.0A CN202110537338A CN113170923A CN 113170923 A CN113170923 A CN 113170923A CN 202110537338 A CN202110537338 A CN 202110537338A CN 113170923 A CN113170923 A CN 113170923A
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- electronic cigarette
- temperature
- tobacco tar
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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
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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
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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
- A24F40/50—Control or monitoring
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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
- A24F40/50—Control or monitoring
- A24F40/53—Monitoring, e.g. fault detection
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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
- A24F40/80—Testing
Abstract
The invention relates to a method and a system for detecting tobacco tar of an electronic cigarette, which are applied to a heating and temperature-rising stage of the electronic cigarette, a constant-temperature keeping stage of the electronic cigarette and a cooling stage of the electronic cigarette, wherein in the heating and temperature-rising stage of the electronic cigarette, the electronic cigarette is heated and heated at constant power to obtain the heating time of the electronic cigarette from a first initial temperature to a first target temperature; comparing the heating time with a first preset threshold value to obtain a first comparison result; in the constant temperature keeping stage of the electronic cigarette, acquiring the heating duty ratio of the electronic cigarette for keeping the second target temperature; comparing the heating duty ratio with a second preset threshold value to obtain a second comparison result; in the electronic cigarette cooling stage, the cooling time of the electronic cigarette from the second initial temperature to the third target temperature is obtained; comparing the cooling time with a third preset threshold value to obtain a third comparison result; and detecting the electronic cigarette smoke according to the first comparison result, the second comparison result or the third comparison result. The invention greatly improves the timeliness and the accuracy of the detection of the electronic cigarette tobacco tar.
Description
Technical Field
The invention relates to the technical field of electronic cigarette tobacco tar detection, in particular to a method and a system for detecting electronic cigarette tobacco tar.
Background
The inside of the cartridge of the electronic cigarette contains a certain amount of tobacco tar, and the tobacco tar is atomized by heating the tobacco tar through the atomizer. Along with the increase of smoking times, the tobacco tar gradually reduces, and when the tobacco tar is not enough, the atomizer heating can lead to the oil guide cotton to appear burnt flavor because of high temperature and even cause the oil guide cotton to burn, and for the ceramic atomizer without the oil guide cotton, when oil-free heating, the ceramic atomizer also has slight burnt flavor. How to detect whether the electronic cigarette has tobacco tar and then prevent burnt smell from appearing is crucial.
Disclosure of Invention
The invention aims to provide a method and a system for detecting tobacco tar of an electronic cigarette, which can timely and accurately detect the tobacco tar of the electronic cigarette and avoid the electronic cigarette from generating burnt flavor.
In order to achieve the purpose, the invention provides the following scheme:
the method for detecting the tobacco tar of the electronic cigarette is applied to an electronic cigarette heating and warming stage, an electronic cigarette constant temperature keeping stage and an electronic cigarette cooling stage, and comprises the following steps:
in the heating and temperature rising stage of the electronic cigarette, the electronic cigarette is heated and raised with constant power, and the heating time of the electronic cigarette from the first starting temperature to the first target temperature is obtained; comparing the heating time with a first preset threshold value to obtain a first comparison result; the first preset threshold value is heating time for heating the electronic cigarette from a first starting temperature to a first target temperature when the tobacco tar exists;
in the constant temperature keeping stage of the electronic cigarette, acquiring the heating duty ratio of the electronic cigarette for keeping the second target temperature; comparing the heating duty ratio with a second preset threshold value to obtain a second comparison result; the second preset threshold is a heating duty ratio of the electronic cigarette for keeping a second target temperature when the tobacco tar exists;
in the electronic cigarette cooling stage, the cooling time of the electronic cigarette from the second initial temperature to the third target temperature is obtained; comparing the cooling time with a third preset threshold value to obtain a third comparison result; the third preset threshold is the cooling time for the electronic cigarette to be cooled from the second initial temperature to the third target temperature when the tobacco tar exists;
and detecting the electronic cigarette tobacco tar according to the first comparison result, the second comparison result or the third comparison result.
Optionally, if the first comparison result is that the heating time is greater than or equal to the first preset threshold, the electronic cigarette has tobacco tar; and if the first comparison result shows that the heating time is less than the first preset threshold value, the electronic cigarette has no tobacco tar.
Optionally, if the second comparison result is that the heating duty ratio is greater than or equal to the second preset threshold, the electronic cigarette has tobacco tar; and if the second comparison result shows that the heating duty ratio is smaller than the second preset threshold, the electronic cigarette has no tobacco tar.
Optionally, if the third comparison result shows that the cooling time is less than or equal to the third preset threshold, the electronic cigarette has tobacco tar; and if the third comparison result shows that the cooling time is greater than the third preset threshold, the electronic cigarette has no tobacco tar.
Optionally, the first starting temperature is less than the first target temperature, the first target temperature is less than or equal to the second target temperature, the second target temperature is greater than or equal to the second starting temperature, and the second starting temperature is greater than the third target temperature.
An electronic cigarette tobacco tar detection system comprises an atomization module, a power supply control module, a temperature measurement module and a controller;
an atomizer is arranged in the atomization module and used for heating tobacco tar;
the power supply control module comprises a power supply and a control switch, and the power supply is used for supplying power to the atomizer and the controller; the control switch is respectively connected with the atomizer and a PMW interface inside the controller;
the temperature measuring module is used for measuring the temperature of the atomizer;
the controller is used for controlling the power supply or the power off of the atomizer through the control switch according to the temperature.
Optionally, the atomization module is a thermocouple type heating wire, the temperature measurement module comprises a temperature sensor and an analog-to-digital converter, the input end of the analog-to-digital converter is connected with the heating wire, the output end of the analog-to-digital converter is connected with the control power, the analog-to-digital converter is used for measuring the voltage value of the thermocouple type heating wire, the temperature sensor is used for measuring the temperature of the cold end of the heating wire, the controller is respectively connected with the temperature sensor and the analog-to-digital converter, and the controller calculates the temperature of the thermocouple type heating wire through the measured temperature and the measured voltage value.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
(1) according to the invention, through the time sequence detection of the temperature rising curve of the atomizer, the time sequence detection of the PWM duty ratio required for power supply for keeping the temperature of the atomizer constant and the time sequence detection of the temperature falling curve of the atomizer, whether the electronic cigarette has tobacco tar or not can be accurately detected in time, the work of the atomizer is forcibly stopped, and the burnt smell is avoided.
(2) The prior art generally only detects whether tobacco tar exists during the constant temperature keeping period, and the technical scheme can detect the oil smoke conditions of the electronic cigarette atomizer in three stages of the heating period, the constant temperature keeping period and the cooling period, so that the condition of dry burning of the missing oil smoke can be detected earlier, and a smoker is prevented from absorbing burnt smell.
(3) The detection method is not only suitable for the tobacco tar detection of the atomizer containing temperature detection or temperature control, but also suitable for other liquid detection related to liquid atomization or liquid gasification.
(4) According to the technical scheme for detecting the tobacco tar, only the original atomization module and the temperature measurement module of the electronic cigarette are used, no additional circuit is needed, and the BOM cost of peripheral hardware is reduced.
Drawings
Fig. 1 is a flowchart of a method for detecting the tobacco tar of an electronic cigarette according to an embodiment of the present invention;
FIG. 2 is a block diagram of an E-liquid detection system provided by an embodiment of the present invention;
FIG. 3 is a timing diagram illustrating the temperature and heating status of an electronic cigarette atomizer according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an electronic cigarette smoke detection system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The invention aims to provide a method and a system for detecting tobacco tar of an electronic cigarette, which can accurately detect the tobacco tar of the electronic cigarette in time and avoid the electronic cigarette from generating burnt flavor.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment provides an electronic cigarette tobacco tar detection method, which is applied to an electronic cigarette heating and temperature rising stage, an electronic cigarette constant temperature keeping stage and an electronic cigarette cooling stage, and as shown in fig. 1, the method includes:
step 101: in the heating and temperature rising stage of the electronic cigarette, the electronic cigarette is heated and raised with constant power, and the heating time of the electronic cigarette from the first starting temperature to the first target temperature is obtained; comparing the heating time with a first preset threshold value to obtain a first comparison result; the first preset threshold is a heating time for heating the electronic cigarette from a first starting temperature to a first target temperature when the tobacco tar is present.
Step 102: in the constant temperature keeping stage of the electronic cigarette, acquiring the heating duty ratio of the electronic cigarette for keeping the second target temperature; comparing the heating duty ratio with a second preset threshold value to obtain a second comparison result; the second preset threshold is a heating duty ratio of the electronic cigarette for keeping the second target temperature when the tobacco tar exists.
Step 103: in the electronic cigarette cooling stage, the cooling time of the electronic cigarette from the second initial temperature to the third target temperature is obtained; comparing the cooling time with a third preset threshold value to obtain a third comparison result; the third preset threshold is a cooling time for the electronic cigarette to decrease from the second starting temperature to a third target temperature when the tobacco tar is present.
Step 104: and detecting the electronic cigarette smoke according to the first comparison result, the second comparison result or the third comparison result. The method specifically comprises the following steps:
if the first comparison result shows that the heating time is greater than or equal to a first preset threshold value, the electronic cigarette has tobacco tar; if the first comparison result is that the heating time is less than a first preset threshold value, the electronic cigarette has no tobacco tar.
If the second comparison result is that the heating duty ratio is greater than or equal to a second preset threshold value, the electronic cigarette has tobacco tar; if the second comparison result is that the heating duty ratio is smaller than a second preset threshold value, the electronic cigarette has no tobacco tar.
If the third comparison result is that the cooling time is less than or equal to a third preset threshold, the electronic cigarette has tobacco tar; if the third comparison result is that the cooling time is greater than a third preset threshold, the electronic cigarette has no tobacco tar.
In this embodiment, the first starting temperature is less than the first target temperature, the first target temperature is less than or equal to the second target temperature, the second target temperature is greater than or equal to the second starting temperature, the second starting temperature is greater than the third target temperature, the first starting temperature is higher than the normal temperature, the first target temperature is lower than the atomization temperature of the tobacco tar and the temperature at which the oil guide cotton generates burnt smell, the second target temperature is the actual atomization temperature of the tobacco tar, the third starting temperature is less than or equal to the actual atomization temperature, and the third target temperature is higher than the normal temperature.
Further, the first starting temperatures may be 50 ℃, 100 ℃ and 150 ℃, and the corresponding first target temperatures may be 100 ℃, 150 ℃ and 200 ℃. The second target temperature may be 200 ℃, where 200 ℃ is the temperature at which the tobacco tar is atomized. The third starting temperature may be 200 ℃ and 150 ℃, and the corresponding third target temperature may be 100 ℃ and 50 ℃. The temperature setting is set according to the atomization temperature characteristics of the particular tobacco tar and the atomizer type.
The principle of the invention is further explained:
as shown in fig. 2, the electronic cigarette smoke detection system includes an atomization module, a power control module, a temperature measurement module, and a controller. An atomizer is arranged in the atomization module and used for heating tobacco tar. The power control module comprises a power supply and a control switch, and the power supply is used for supplying power to the atomizer and the controller. The control switch is respectively connected with the atomizer and the PMW interface inside the controller. The temperature measuring module is used for measuring the temperature of the atomizer. The controller is used for controlling the power supply or the power off of the atomizer through the control switch according to the temperature.
Specifically, the atomization module is a thermocouple type heater strip (for example, the atomization module is composed of a heater strip composed of a nickel-chromium alloy wire and a copper-nickel alloy wire, and is combined to form an E-type thermocouple), the temperature measurement module includes a temperature sensor and an analog-to-digital converter, an input end of the analog-to-digital converter is connected to the heater strip, an output end of the analog-to-digital converter is connected to a control right, the analog-to-digital converter is used for measuring a voltage value of the thermocouple type heater strip, the temperature sensor is used for measuring a temperature of a cold end of the heater strip, the controller is respectively connected to the temperature sensor and the analog-to-digital converter, and the controller calculates an accurate temperature of the thermocouple type heater strip through the measured temperature and voltage value (refer to patent document CN112021676A specifically).
Fig. 3 is a time sequence waveform of temperature variation and power supply state of the electronic cigarette atomizer, wherein the upper part is a waveform output by a PWM module of the controller, a high level indicates that the atomizer is powered and heated, a low level indicates that the atomizer stops heating while detecting the temperature of the atomizer, if the temperature is not lower than a set temperature, no power is supplied and heating is performed, if the temperature is lower than the set temperature, power is supplied and heating is performed, and a time Δ T of single power supply and heating is fixed. The lower curve is the atomizer temperature curve.
As shown on the left side of fig. 3, the room temperature was set to 20 ℃, and the electronic cigarette heating target was set to 200 ℃. When the electronic cigarette has tobacco tar, when smoking, in a time period T1, PWM of the controller firstly outputs a high level of delta T time to heat the atomizer, then heating is stopped, the controller measures the temperature of the atomizer through the temperature measuring module, if the temperature is lower than 200 ℃, next heating and measuring are carried out, circulation is carried out in sequence, the atomizer is heated at the fastest speed in the stage, and the atomizer is heated from 20 ℃ to 200 ℃; in a time period T2, the controller adjusts the PWM duty ratio according to the measured temperature of the atomizer, and the atomizer keeps the temperature of 200 ℃ constant; when smoking is stopped, the PWM waveform of the controller is continuously low in the T3 time period, and the atomizer is cooled from 200 ℃ to 20 ℃.
As shown in the right side of fig. 3, when no tobacco tar is present, the temperature rising speed of the electronic cigarette is greater than that when the tobacco tar is present, so if T1' is less than T1, it indicates that the tobacco tar is not present in the electronic cigarette, and conversely, the tobacco tar is present.
It will be appreciated that the temperature sensing range of the T1 stage may be controlled, for example, by setting the time for the temperature to rise from 50 c to 100 c or 100 c to 150 c, depending on the temperature at which the tobacco is atomized, but provided that the maximum value of the temperature range is below the minimum temperature required for tobacco atomization and the minimum temperature required for scorched flavor development.
At the constant temperature keeping stage T2 ', the duty ratio of the PWM module waveform is detected in real time, that is, the power required to supply power to the atomizer is required to keep a certain constant temperature, and if the duty ratio of the T2' time period is greater than the duty ratio of the T2 time period, that is, the constant temperature can be kept with a small output power, it indicates that the electronic cigarette does not have tobacco tar, otherwise, the tobacco tar exists.
Further, in the period T3', if the temperature drops too slowly, which is greater than the period T3, it indicates that there is no tobacco tar in the electronic cigarette, otherwise, there is tobacco tar in the electronic cigarette. It will also be appreciated that the temperature range of the T3 stage may also be controlled, for example the time required to detect a temperature drop from 200 ℃ to 150 ℃ or from 150 ℃ to 100 ℃ may be set according to the actual maximum temperature at which the atomiser is heated, but provided that the maximum temperature does not exceed the actual operating temperature of the atomiser.
When the tobacco tar does not exist, the time required by the atomizer to heat from the first starting temperature to the first target temperature is the first preset threshold, the heating duty ratio of the electronic cigarette for keeping the second target temperature is the second preset threshold, and the cooling time of the electronic cigarette when the electronic cigarette is reduced from the third starting temperature to the third target temperature is the third preset threshold.
Fig. 4 is a circuit diagram of an electronic cigarette smoke detection system according to an embodiment of the present invention, where the circuit includes a microprocessor U1, an operational amplifier U2, an analog-to-digital converter U3, a heating switch Q1, a nichrome heating wire R1, a copper-nickel alloy wire R2, and a thermistor R3, where the nichrome heating wire R1 and the copper-nickel alloy wire R2 are combined to form an E-type thermocouple, the microprocessor U1 controls the power on and off of the nichrome heating wire R1 through the heating switch Q1, the thermistor R3 is used to measure a temperature signal at the end of the copper-nickel alloy wire R2 and input the temperature signal to the microprocessor U1, the operational amplifier U2 and the analog-to-digital converter U3 form a voltage measurement circuit, measure a potential difference of the E-type thermocouple and feed back to the microprocessor U1, and the microprocessor U1 can calculate an actual temperature of the copper-nickel alloy wire R2 through a potential difference of the E-type thermocouple and a temperature at the end of the copper-nickel alloy wire R2. The microprocessor U1 can control the heating switch Q1 through a built-in PWM module, so that the heating or stopping of the heating wire is controlled, meanwhile, the microprocessor U1 can measure the accurate temperature of the copper-nickel alloy wire R2 through the cooperation with the operational amplifier U2, the analog-to-digital converter U3 and the thermistor R3, the microprocessor U1 judges whether the electronic cigarette has tobacco tar according to the electronic cigarette tobacco tar detection method, and the operational amplifier U2 can be omitted according to actual conditions.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to assist in understanding the core concepts of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. The method for detecting the tobacco tar of the electronic cigarette is applied to a heating and temperature-rising stage of the electronic cigarette, a constant-temperature keeping stage of the electronic cigarette and a cooling stage of the electronic cigarette, and comprises the following steps:
in the heating and temperature rising stage of the electronic cigarette, the electronic cigarette is heated and raised with constant power, and the heating time of the electronic cigarette from the first starting temperature to the first target temperature is obtained; comparing the heating time with a first preset threshold value to obtain a first comparison result; the first preset threshold value is heating time for heating the electronic cigarette from a first starting temperature to a first target temperature when the tobacco tar exists;
in the constant temperature keeping stage of the electronic cigarette, acquiring the heating duty ratio of the electronic cigarette for keeping the second target temperature; comparing the heating duty ratio with a second preset threshold value to obtain a second comparison result; the second preset threshold is a heating duty ratio of the electronic cigarette for keeping a second target temperature when the tobacco tar exists;
in the electronic cigarette cooling stage, the cooling time of the electronic cigarette from the second initial temperature to the third target temperature is obtained; comparing the cooling time with a third preset threshold value to obtain a third comparison result; the third preset threshold is the cooling time for the electronic cigarette to be cooled from the second initial temperature to the third target temperature when the tobacco tar exists;
and detecting the electronic cigarette tobacco tar according to the first comparison result, the second comparison result or the third comparison result.
2. The method for detecting the tobacco tar in the electronic cigarette according to claim 1, wherein if the first comparison result is that the heating time is greater than or equal to the first preset threshold, the tobacco tar is present in the electronic cigarette; and if the first comparison result shows that the heating time is less than the first preset threshold value, the electronic cigarette has no tobacco tar.
3. The method for detecting the electronic cigarette tobacco tar according to claim 1, wherein if the second comparison result is that the heating duty ratio is greater than or equal to the second preset threshold, the electronic cigarette has tobacco tar; and if the second comparison result shows that the heating duty ratio is smaller than the second preset threshold, the electronic cigarette has no tobacco tar.
4. The method for detecting the tobacco tar of the electronic cigarette according to claim 1, wherein if the third comparison result is that the cooling time is less than or equal to the third preset threshold, the tobacco tar is present in the electronic cigarette; and if the third comparison result shows that the cooling time is greater than the third preset threshold, the electronic cigarette has no tobacco tar.
5. The e-liquid detection method of claim 1, wherein the first starting temperature is less than the first target temperature, the first target temperature is less than or equal to the second target temperature, the second target temperature is greater than or equal to the second starting temperature, and the second starting temperature is greater than the third target temperature.
6. An electronic cigarette tobacco tar detection system is characterized by comprising an atomization module, a power supply control module, a temperature measurement module and a controller;
an atomizer is arranged in the atomization module and used for heating tobacco tar;
the power supply control module comprises a power supply and a control switch, and the power supply is used for supplying power to the atomizer and the controller; the control switch is respectively connected with the atomizer and a PMW interface inside the controller;
the temperature measuring module is used for measuring the temperature of the atomizer;
the controller is used for controlling the power supply or the power off of the atomizer through the control switch according to the temperature of the atomizer.
7. The electronic cigarette liquid detection system of claim 6, wherein the atomization module is a thermocouple type heater strip, the temperature measurement module comprises a temperature sensor and an analog-to-digital converter, an input end of the analog-to-digital converter is connected with the heater strip, an output end of the analog-to-digital converter is connected with a control right, the analog-to-digital converter is used for measuring a voltage value of the thermocouple type heater strip, the temperature sensor is used for measuring a temperature of a cold end of the heater strip, the controller is respectively connected with the temperature sensor and the analog-to-digital converter, and the controller calculates the temperature of the thermocouple type heater strip according to the measured temperature and voltage value.
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| CN202110537338.0A CN113170923A (en) | 2021-05-18 | 2021-05-18 | Electronic cigarette tobacco tar detection method and system |
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| CN114184403A (en) * | 2021-11-17 | 2022-03-15 | 江西联智集成电路有限公司 | Method and system for testing heating function of electronic cigarette mainboard and electronic equipment |
| WO2023124503A1 (en) * | 2021-12-30 | 2023-07-06 | 江门摩尔科技有限公司 | Main unit and electronic atomization device |
| WO2023240666A1 (en) * | 2022-06-17 | 2023-12-21 | 云南中烟工业有限责任公司 | Temperature control method and apparatus for heating body in heating cigarette heater, and heating cigarette |
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