CN112189907A - Automatic temperature control method of electronic atomizer and electronic atomizer with same - Google Patents
Automatic temperature control method of electronic atomizer and electronic atomizer with same Download PDFInfo
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- CN112189907A CN112189907A CN202010952847.5A CN202010952847A CN112189907A CN 112189907 A CN112189907 A CN 112189907A CN 202010952847 A CN202010952847 A CN 202010952847A CN 112189907 A CN112189907 A CN 112189907A
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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
- A24F40/57—Temperature control
Abstract
The invention discloses an automatic temperature control method of an electronic atomizer and the electronic atomizer with the method, wherein the automatic temperature control method comprises the following steps in the working process that the electronic atomizer is sucked every time: in the first stage, the output voltage is regulated by regulating the duty ratio of PWM, so that the heating element of the electronic atomizer is quickly heated to a working temperature set value; and in the second stage, after the working temperature set value is reached, the real-time working temperature of the heating element is maintained at the working temperature set value by adjusting the duty ratio of PWM. The method has the advantages that the working temperature of the heating element can be accurately and stably controlled, so that the electronic atomizer can quickly generate uniform, stable and constant-temperature vapor fog or aerosol, and meanwhile, the voltage output is quickly turned off when the liquid supply of the heating element is insufficient, the electronic atomizer is prevented from being dried, and the use experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of electronic atomizers, in particular to an automatic temperature control method of an electronic atomizer and the electronic atomizer with the method.
Background
Electronic atomizers typically include a heating assembly and a battery assembly for controlling the heating assembly and providing power to the heating assembly. The heating assembly comprises a heating element which can heat the liquid to be atomized to generate vapor or aerosol for a user to suck. The liquid to be atomized includes electronic cigarette liquid or liquid medicine with medicine dissolved.
Most of the existing electronic atomizers generally adopt a temperature control method that when a user sucks one mouth, after a starting switch is turned on, a heating element generally heats and atomizes in a constant power or constant voltage output mode, the working temperature of the heating element continuously rises, and generated vapor or aerosol is uneven and unstable.
Disclosure of Invention
The present invention aims at providing one kind of automatic temperature controlling method for electronic atomizer and the electronic atomizer with the method.
The technical scheme of the invention is realized as follows: an automatic temperature control method for an electronic atomizer comprises the following steps in each suction working process of the electronic atomizer:
in the first stage, the output voltage is regulated by regulating the duty ratio of PWM, so that the heating element of the electronic atomizer is quickly heated to a working temperature set value;
and in the second stage, after the working temperature set value is reached, the real-time working temperature of the heating element is maintained at the working temperature set value by adjusting the duty ratio of PWM.
Preferably, the method further comprises the following steps:
and in the dry burning prevention stage, when the heating element is lack of liquid to be atomized, the duty ratio of PWM is reduced to maintain the working temperature of the heating element at a working temperature set value, and when the duty ratio of PWM is continuously lower than the set duty ratio for a set number of times, the output voltage of the electronic atomizer is turned off.
Preferably, in the first phase, the duty cycle of the PWM is regulated with a constant power output.
Preferably, the duty ratio of the PWM is adjusted by a PID control method according to a difference between the detected real-time temperature and the set value of the operating temperature.
Preferably, the operating temperature of the heating element is detected by providing a temperature sensor within the electronic atomizer.
Preferably, the resistance of the heating element is set to be a thermistor with a positive temperature coefficient, and the working temperature of the heating element is obtained by detecting the resistance value of the heating element and converting according to the corresponding relation between the resistance value of the thermistor and the temperature.
Preferably, the resistance value detection time of the heating element is set to a non-energization time of an output voltage pulse cycle.
Preferably, the method further comprises the following specific operation steps:
(1) suction is started;
(2) the duty ratio of PWM is adjusted in a constant power output mode so as to rapidly increase the temperature;
(3) detecting the resistance value of the heating element and converting the resistance value into a real-time working temperature;
(4) comparing the real-time working temperature with a working temperature set value;
(5) after the working temperature set value is reached, the PWM duty ratio is immediately reduced to avoid the real-time working temperature from greatly rising;
(6) adjusting the PWM output duty ratio by a PID algorithm according to the difference value between the real-time working temperature and the working temperature set value;
(7) stabilizing the real-time working temperature of the heating element at a working temperature set value;
(8) whether the PWM output duty ratio is continuously lower than the set duty ratio reaches the set times or not, if not, the next step is carried out; if yes, judging the state is a dry burning state, and entering the step (10);
(9) judging whether the pumping is finished or not, if not, returning to the step (6); if yes, entering the next step;
(10) the voltage output is turned off.
Preferably, the method or steps are automatically controlled by a computer program preset in the microcontroller.
The invention also provides an electronic atomizer with an automatic temperature control method, which is used for the method and comprises an atomizing assembly and a battery assembly, wherein the atomizing assembly comprises a heating element for heating liquid to be atomized, the battery assembly comprises a battery, a control circuit and a starting switch, the control circuit comprises a microcontroller, a voltage output control unit and a temperature detection unit, the voltage output control unit is electrically connected with the microcontroller, a PWM signal generation unit and a parameter storage unit are arranged in the microcontroller, a computer program is preset for automatic control, the PWM signal generation unit sends PWM signals to a voltage output control unit, and the voltage output control unit outputs corresponding PWM voltages to the heating element.
The invention has the following beneficial effects: by using the automatic temperature control method, the working temperature of the heating element can be accurately and stably controlled, so that the electronic atomizer can quickly generate uniform, stable and constant-temperature vapor fog or aerosol, and the voltage output is quickly cut off when the liquid supply of the heating element is insufficient, thereby preventing the electronic atomizer from being dried and improving the use experience of users.
Drawings
FIG. 1 is a block diagram of the control circuit of the electronic atomizer of the present invention;
FIG. 2 is a graph showing a variation of PWM duty ratio in the automatic temperature control method of the electronic atomizer according to the present invention;
FIG. 3 is a graph showing a heating temperature variation in the automatic temperature control method of the electronic atomizer according to the present invention;
fig. 4 is a flow chart of the specific operation steps of the automatic temperature control method of the electronic atomizer according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example (b):
the electronic atomizer with the automatic temperature control method is used for heating liquid to be atomized so as to generate atomized steam or aerosol for a user to suck.
As shown in fig. 1, the electronic atomizer of the present embodiment includes a heating assembly and a battery assembly (not shown), wherein the heating assembly is provided with a heating element 1 for heating a liquid to be atomized, the heating element 1 is a thermistor with a positive temperature coefficient, the battery assembly is provided with a battery 2, a control circuit and a start switch 3, the control circuit includes a microcontroller 4, a voltage output control unit 5 electrically connected with the microcontroller 4, and a temperature detection unit (not shown). The temperature detection unit of the present embodiment includes a resistance value detection unit 6 and a temperature conversion unit 41 provided in the microcontroller 4. The microcontroller 4 is also provided with a PWM signal generating unit 42, a parameter storage unit 43, and a preset computer program for automatic control, the PWM signal generating unit 42 outputs a PWM signal to the voltage output control unit 5, the voltage output control unit 5 outputs a PWM voltage to the heating element 1 accordingly, the resistance value detecting unit 6 is used for detecting the resistance value of the heating element 1, and the temperature converting unit 41 converts the detected resistance value into a real-time working temperature. The activation switch 3 of this embodiment is a microphone that is triggered when the airflow generated by suction is detected.
In the electronic atomizer of the present embodiment, the resistance of the heating element 1 is set as a thermistor with a positive temperature coefficient, during the operation of the suction, the resistance value of the heating element 1 is detected by the resistance value detecting unit 6, and according to the corresponding relationship between the resistance value of the thermistor and the temperature, the temperature converting unit 41 converts the detected resistance value of the resistor to obtain the real-time operating temperature of the heating element 1. In this embodiment, in order to ensure the accuracy of resistance value detection, the resistance value detection time of the heating element 1 is set to be the non-energization time of the pulse cycle of the output PWM voltage.
The automatic temperature control method of the electronic atomizer in the embodiment of the invention comprises the following steps in the working process that the electronic atomizer is sucked every time:
in the first stage, the output voltage is regulated by regulating the duty ratio of PWM, so that the heating element of the electronic atomizer is quickly heated to a working temperature set value;
in the second stage, after the working temperature set value is reached, the real-time working temperature of the heating element is maintained at the working temperature set value by adjusting the duty ratio of PWM;
and in the dry burning prevention stage, when the heating element is lack of liquid to be atomized, the duty ratio of PWM is reduced to maintain the working temperature of the heating element at a working temperature set value, and when the duty ratio of PWM is continuously lower than the set duty ratio for a set number of times, the output voltage of the electronic atomizer is turned off.
As shown in fig. 2 and 3, the method includes:
first stage t 1: in the present phase t1, i.e. the rapid heating phase, when the electronic atomizer is sucked, the start switch 3 senses the sucked air flow and opens the control circuit, so that the voltage output control unit 5 outputs a voltage to the heating element 1, and the heating element 1 starts to operate. At this time, the heating element 1 is at a low temperature, and in order to atomize the liquid to be atomized as quickly as possible and enable the user to suck the vapor or aerosol, the heating element of the electronic atomizer is enabled to be at the initial temperature T0Quickly heating to a working temperature set value T1In the present embodiment, the heating element 1 is heated by a large power output with a constant power output, and the power calculation formula P is equal to U2To obtain a larger constant power P, a higher stable voltage U needs to be output at this time, and the battery voltage of the electronic atomizer is more fixed, in this embodiment, the PWM signal generating unit 42 adjusts a higher PWM duty ratio to perform PWM modulation output on the battery voltage (as shown in the PWM duty curve at stage t1 in fig. 2), and the voltage output control unit 5 outputs a higher PWM voltage to the heating element 1 accordingly, so that the heating element 1 can be rapidly heated up to the working temperature setting value (as shown in the temperature rising curve at stage t1 in fig. 3). To more clearly understand the temperature rising process at the t1 stage of the method, as shown in fig. 2 and fig. 3, the following is specifically illustrated: when a user sucks one port of vapor or aerosol, the microcontroller 4 calculates the amplitude of the required PWM duty ratio to be about 80% in a set constant power output mode, the PWM signal generating unit 42 generates a PWM signal with the duty ratio, the voltage output control unit 5 outputs the PWM voltage to the heating element 1 according to the PWM signal, and the heating temperature of the heating element 1 is the real-time working temperatureFrom the ambient temperature T0Heating to 15 ℃ within 400 milliseconds until reaching the set working temperature T1At 225 c, the corresponding heating element 1 has a resistance of 1.25 Ω.
Second stage t 2: the stage T2 is the stage of maintaining the set working temperature, when the real-time working temperature reaches the set working temperature value T1Immediately thereafter, the PWM duty ratio is decreased by the PWM signal generating unit 42 to decrease the output voltage (as shown in fig. 2, the PWM duty ratio curve rapidly decreasing at the beginning of the T2 phase), decrease the output power to the heating element 1, and prevent the real-time operating temperature from continuously increasing greatly, and then, the real-time operating temperature is compared with the set value T of the operating temperature1Comparing and maintaining the working temperature of the heating element 1 at the working temperature set value T1(e.g., the curve for constant temperature maintenance during the period t2 in fig. 3). For this reason, the PWM duty ratio of the PWM signal generating unit 42 is adjusted to output a stable PWM control signal to the voltage output control unit 5, and the voltage output control unit 5 outputs a stable PWM voltage to the heating element 1 (e.g. a stable PWM duty ratio curve at the t2 stage shown in fig. 2), so as to adjust the operating temperature and maintain the operating temperature of the heating element 1 at the operating temperature set value. To more clearly understand the process of maintaining the set operating temperature at the t2 stage of the method, as shown in fig. 2 and 3, the following steps are specifically illustrated: when the real-time working temperature reaches the set working temperature value T1After 225 ℃, the microcontroller 4 calculates the required PWM duty cycle to be about 46% in a set constant temperature output manner, within about 50 milliseconds, the PWM signal generating unit 42 decreases the duty cycle of the PWM signal from 85% to 46%, the voltage output control unit 5 outputs the corresponding PWM voltage to the heating element 1 according to the decrease, and the heating temperature of the heating element 1, i.e., the real-time operating temperature, stops increasing rapidly. Then, in the process of continuing smoking, the microcontroller 4 will real-time work temperature and work temperature set value T1Comparing and maintaining the working temperature of the heating element 1 at the working temperature set value T 1225 ℃. The time for each user to suck one port of the aerosol or fog is about 2000-3000 milliseconds.
Dry burning prevention stage t 3: this stage t3 is the working stage of special case, normalThis will not happen, only when the heating element 1 is running short of the liquid to be atomized, and a dry burn is about to occur. When the heating element 1 is lack of the liquid to be atomized or the liquid supply is insufficient, the heating element 1 is about to be dried and burnt, so that the working temperature of the heating element inevitably has a rapid rising trend, at the moment, in order to avoid the rapid rising of the working temperature of the heating element, the output power needs to be rapidly reduced, and according to a power calculation formula P ═ U2The output voltage U of the voltage output control unit needs to be rapidly reduced, and the output voltage U is adjusted by the duty ratio of the PWM, so that the duty ratio of the PWM needs to be continuously reduced. When the duty ratio of the PWM is lower than the set duty ratio, the output power is reduced to be low, the continuous rising trend of the working temperature cannot be continuously prevented, and the dry-burning state occurs, so that the continuous reduction of the PWM duty ratio and the continuous reduction of the output power are unnecessary, and the output voltage of the electronic atomizer is turned off at the moment to prevent the dry-burning from further occurring. In order to avoid misjudgment caused by occasional duty ratio reduction, the output voltage of the electronic atomizer is turned off only when the duty ratio of the PWM is required to be detected to be continuously lower than the set duty ratio for the set times. As shown in fig. 2 and fig. 3, the following are specifically exemplified: when the heating element 1 is about to be dry-burned, the real-time working temperature of the heating element inevitably has a rapid rising trend, in order to inhibit the rising of the real-time working temperature, the PWM signal generating unit 42 is used for reducing the duty ratio of the PWM signal from about 42% downwards, the duty ratio of the PWM is lower than the set duty ratio of 40%, and in the time of 200 milliseconds, the duty ratio of the PWM is continuously reduced, and when the duty ratio is continuously lower than the set duty ratio of 40% for the set times, for example, 10 times, the microcontroller 4 judges that the heating element 1 is dry-burned, and the voltage output control unit 5 closes the output voltage.
In order to control the temperature more accurately, the duty ratio of PWM is adjusted by using a PID control method according to the difference between the detected real-time temperature and the working temperature setting value.
In other embodiments, the operating temperature of the heating element may also be detected by providing a temperature sensor (not shown) within the electronic atomizer.
As shown in fig. 4, the automatic temperature control method of the electronic atomizer of the present embodiment specifically includes the following operation steps:
(1) suction is started;
(2) the duty ratio of PWM is adjusted in a constant power output mode so as to rapidly increase the temperature;
(3) detecting the resistance value of the heating element and converting the resistance value into a real-time working temperature;
(4) comparing the real-time working temperature with a working temperature set value;
(5) after the working temperature set value is reached, the PWM duty ratio is immediately reduced to avoid the real-time working temperature from greatly rising;
(6) adjusting the PWM output duty ratio by a PID algorithm according to the difference value between the real-time working temperature and the working temperature set value;
(7) stabilizing the real-time working temperature of the heating element at a working temperature set value;
(8) whether the PWM output duty ratio is continuously lower than the set duty ratio reaches the set times or not, if not, the next step is carried out; if yes, judging the state is a dry burning state, and entering the step (10);
(9) judging whether the pumping is finished or not, if not, returning to the step (6); if yes, entering the next step;
(10) the voltage output is turned off.
The above-mentioned method or steps are all automatically controlled by presetting computer program in microcontroller.
The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Various modifications and alterations may occur to those skilled in the art without departing from the spirit and scope of the invention, and such modifications and alterations should be accorded the broadest interpretation so as to encompass all such modifications and alterations.
Claims (10)
1. An automatic temperature control method for an electronic atomizer is characterized in that in the process of every time the electronic atomizer is sucked, the method comprises the following steps:
in the first stage, the output voltage is regulated by regulating the duty ratio of PWM, so that the heating element of the electronic atomizer is quickly heated to a working temperature set value;
and in the second stage, after the working temperature set value is reached, the real-time working temperature of the heating element is maintained at the working temperature set value by adjusting the duty ratio of PWM.
2. The method for automatically controlling the temperature of an electronic atomizer according to claim 1, further comprising:
and in the dry burning prevention stage, when the heating element is lack of liquid to be atomized, the duty ratio of PWM is reduced to maintain the working temperature of the heating element at a working temperature set value, and when the duty ratio of PWM is continuously lower than the set duty ratio for a set number of times, the output voltage of the electronic atomizer is turned off.
3. The method according to claim 1 or 2, wherein in the first phase, the duty ratio of PWM is adjusted in a constant power output manner.
4. The automatic temperature control method of an electronic atomizer according to claim 1 or 2, wherein the duty ratio of PWM is adjusted by PID control according to the difference between the detected real-time temperature and the set value of the operating temperature.
5. The automatic temperature control method of an electronic atomizer according to claim 1 or 2, wherein the operating temperature of the heating element is detected by providing a temperature sensor in the electronic atomizer.
6. The automatic temperature control method of an electronic atomizer according to claim 1 or 2, wherein the resistance of the heating element is set to a thermistor with a positive temperature coefficient, and the operating temperature of the heating element is obtained by detecting the resistance value of the heating element and converting the corresponding relationship between the resistance value of the thermistor and the temperature.
7. The method according to claim 6, wherein the resistance value detection time of the heating element is set to a non-energization time of an output voltage pulse cycle.
8. The automatic temperature control method of the electronic atomizer according to claim 2, further comprising the following specific operation steps:
(1) suction is started;
(2) the duty ratio of PWM is adjusted in a constant power output mode so as to rapidly increase the temperature;
(3) detecting the resistance value of the heating element and converting the resistance value into a real-time working temperature;
(4) comparing the real-time working temperature with a working temperature set value;
(5) after the working temperature set value is reached, the PWM duty ratio is immediately reduced to avoid the real-time working temperature from greatly rising;
(6) adjusting the PWM output duty ratio by a PID algorithm according to the difference value between the real-time working temperature and the working temperature set value;
(7) stabilizing the real-time working temperature of the heating element at a working temperature set value;
(8) whether the PWM output duty ratio is continuously lower than the set duty ratio reaches the set times or not, if not, the next step is carried out; if yes, judging the state is a dry burning state, and entering the step (10);
(9) judging whether the pumping is finished or not, if not, returning to the step (6); if yes, entering the next step;
(10) the voltage output is turned off.
9. The method for automatically controlling the temperature of an electronic atomizer according to any one of claims 1 to 8, wherein said method or steps are automatically controlled by a computer program preset in said microcontroller.
10. An electronic atomizer with an automatic temperature control method is used for realizing the method of any one of claims 1 to 9, and comprises an atomizing assembly and a battery assembly, wherein the atomizing assembly comprises a heating element for heating liquid to be atomized, the battery assembly comprises a battery, a control circuit and a starting switch, the control circuit comprises a microcontroller, a voltage output control unit and a temperature detection unit, the voltage output control unit is electrically connected with the microcontroller, a PWM signal generation unit and a parameter storage unit are arranged in the microcontroller, and a computer program is preset for automatic control, the PWM signal generation unit sends PWM signals to a voltage output control unit, and the voltage output control unit outputs corresponding PWM voltages to the heating element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010952847.5A CN112189907A (en) | 2020-09-11 | 2020-09-11 | Automatic temperature control method of electronic atomizer and electronic atomizer with same |
| PCT/CN2021/104879 WO2022052612A1 (en) | 2020-09-11 | 2021-07-07 | Automatic temperature control method for electronic atomizer and electronic atomizer using same |
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| CN202010952847.5A CN112189907A (en) | 2020-09-11 | 2020-09-11 | Automatic temperature control method of electronic atomizer and electronic atomizer with same |
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| CN113854638A (en) * | 2021-06-18 | 2021-12-31 | 北京温致科技有限公司 | Electronic atomizer |
| CN113933204A (en) * | 2021-10-14 | 2022-01-14 | 深圳市艾溹技术研究有限公司 | Electronic atomizer and method for measuring moisture content of smoke of electronic atomizer |
| WO2022052611A1 (en) * | 2020-09-11 | 2022-03-17 | 惠州市新泓威科技有限公司 | Electronic atomiser with constant temperature control |
| WO2022052612A1 (en) * | 2020-09-11 | 2022-03-17 | 惠州市新泓威科技有限公司 | Automatic temperature control method for electronic atomizer and electronic atomizer using same |
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| CN113854638A (en) * | 2021-06-18 | 2021-12-31 | 北京温致科技有限公司 | Electronic atomizer |
| WO2022267806A1 (en) * | 2021-06-25 | 2022-12-29 | 深圳麦时科技有限公司 | Aerosol forming apparatus and vaping detection method therefor, and computer storage medium |
| CN113933204A (en) * | 2021-10-14 | 2022-01-14 | 深圳市艾溹技术研究有限公司 | Electronic atomizer and method for measuring moisture content of smoke of electronic atomizer |
| CN114340054A (en) * | 2021-12-28 | 2022-04-12 | 江苏精微特电子股份有限公司 | PTC heating plate and control method thereof |
| CN114340054B (en) * | 2021-12-28 | 2024-01-30 | 江苏精微特电子股份有限公司 | PTC heating plate and control method thereof |
| WO2023169526A1 (en) * | 2022-03-11 | 2023-09-14 | 深圳市合元科技有限公司 | Electronic atomization apparatus and control method for electronic atomization apparatus |
| CN114838506A (en) * | 2022-05-06 | 2022-08-02 | 珠海格力电器股份有限公司 | Anti-freezing and anti-dry-burning device, water heater and control method thereof |
| WO2024061198A1 (en) * | 2022-09-19 | 2024-03-28 | 深圳市合元科技有限公司 | Electronic atomization apparatus and control method therefor |
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| WO2022052612A1 (en) | 2022-03-17 |
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