WO2019033888A1 - 电子烟具的发热装置及其控制方法 - Google Patents
电子烟具的发热装置及其控制方法 Download PDFInfo
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- WO2019033888A1 WO2019033888A1 PCT/CN2018/096065 CN2018096065W WO2019033888A1 WO 2019033888 A1 WO2019033888 A1 WO 2019033888A1 CN 2018096065 W CN2018096065 W CN 2018096065W WO 2019033888 A1 WO2019033888 A1 WO 2019033888A1
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Classifications
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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
-
- 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
Definitions
- the invention relates to the technical field of an electronic smoking article, in particular to a heating device for an electronic smoking article and a control method thereof.
- cigarettes In general, cigarettes emit cigarette smoke when the open flame is burned for smokers to inhale. When the cigarettes are burned, they will decompose and produce harmful substances such as tobacco tar, carbon monoxide, phenol, nitrogen oxides, olefins, and polycyclic aromatic hydrocarbons. These substances can seriously damage human health.
- an electronic smoking device that can assist smoking is produced on the market, in which smoking users place tobacco products (such as cigarettes and tobacco cores) in smoking. Electrically heated, the tobacco product is baked at a temperature below the flammable temperature of the tobacco product until smoking, and the smoking user is able to inhale the cigarette smoke. Since tobacco products are burned by heat rather than open flames, and the user inhals a large amount of harmful substances generated by burning of tobacco products due to open flames, smoking using electronic smoking articles is widely used.
- the outer wall of the cigarette body in the standby or smoking state, is generally subjected to constant voltage heating through the heat pipe, and the heat conduction is slow, and the overall temperature of the cigarette body is slow, resulting in a small amount of smoke being sucked out, but After the temperature rises, since the heating cup is closely attached to the outer wall of the cigarette body, the heat is slowly transmitted to the inside through the outer wall of the cigarette body, and the temperature on the outer wall side of the cigarette is too high, and it is easy to burn and produce a burnt smell.
- the technical solution of the present invention is a heat generating device of the electronic smoking device, which is special in that it comprises a microcontroller, a battery power supply circuit, a buck-boost bridge circuit, a heat generating unit, a resistance sampling circuit of the heat generating unit, and a resistance value of the heat generating unit.
- the battery power supply circuit comprises a switch and a rechargeable battery
- the micro-controller is electrically connected to the buck-boost bridge circuit, the heating unit resistance sampling circuit, the heating unit, the heating unit resistance detecting module, and then back to the micro a controller, the heating unit sampling circuit is connected to the resistance detecting module, a feedback circuit is connected between the buck-boost bridge circuit and the heat generating unit, and the feedback circuit is connected back to the microcontroller, when the electronic smoking device During use, when the temperature of the heating unit changes, the resistance value also changes accordingly.
- the resistance detecting module of the heating unit detects the resistance value of the heating unit and converts it into a corresponding temperature electrical signal and transmits it to the microcontroller, and the microcontroller according to the temperature After the electrical signal is compared with the set temperature value, a control signal is sent to the buck-boost bridge circuit, so that the output voltage of the buck-boost bridge circuit is generated. Changes, power heat-generating unit also changes so as to adjust the temperature stabilization heat generation unit.
- the method further includes an auxiliary boosting module, wherein the microcontroller is connected to an input end of the auxiliary boosting module, and an output of the auxiliary boosting module is connected to the buck-boosting circuit.
- the heat generating unit is electrically connected to the short circuit detecting module, and the short circuit detecting module is connected to the microcontroller.
- the microcontroller is electrically connected to the charging circuit
- the charger is electrically connected to the charging voltage detecting module and then connected to the microcontroller
- the charger is electrically connected to the charging circuit and the battery power supply circuit
- the battery power supply circuit is respectively micro-controlled And power supply from the buck-boost circuit.
- the microcontroller further electrically connects the LED control module, the switch detection module and the motor vibration control module.
- the heat generating unit resistance detecting module comprises an operational amplifier U 4 , a resistor R 16 , a resistor R 17 , a capacitor C 12 , a resistor R 19 , a capacitor C 13 , a resistor R 22 , a capacitor C 14 , and a capacitor C 15 .
- said heating means includes a resistor sensing circuit resistance R 18, the operational amplifier U 4 having a first pin REF, a second pin GND, a third pin VCC, fourth pins IN +, IN- and fifth pin
- the sixth pin OUT, the fourth pin IN+ of the operational amplifier U 4 is respectively connected to the capacitor C 12 and the resistor R 17 and then connected to the output terminal VOUT of the buck-boost circuit, and the fifth pin IN- is respectively connected to the capacitor C 12 and the resistor.
- R 16 is connected to the PWM-OUT of the sampling circuit of the heating unit, the connection between the resistor R 16 and the PWM-OUT of the sampling circuit output of the heating unit, and the connection of the resistor R 17 and the output terminal of the buck-boost circuit VOUT Connect the resistor R 18 between the points
- the sixth pin OUT of the operational amplifier U4 is connected to the resistor R 19 and then respectively connect the current detection signal IDET and the capacitor C 13 , the other end of the capacitor C 13 is grounded, and the first pin of the operational amplifier U 4 REF and a second ground pin GND
- a third operational amplifier pin VCC U 4 is connected to the resistor R 22 access auxiliary boost VCC-12V, the third pin VCC and
- the junction between the resistor R 22 are connected to the capacitor C 15 and the capacitor C 14, the capacitor C 15 and the other end grounded capacitor C 14; and when a current passes through the resistor R 18, at both ends of the resistor R 18 will divide the voltage, through the resistor R 16.
- the resistor R 17 and the capacitor C 12 are filtered once and input to the operational amplifier U 4 .
- the operational amplifier U 4 amplifies the filtered voltage and filters it through the resistor R 19 and the capacitor C 13 , and then calculates the current detection signal IDET.
- the resistance of the heating unit is the resistance of the heating unit.
- the buck-boost bridge circuit comprises a chip U 1 , a chip U 2 , MOS transistors Q 1 and Q 2 , MOS transistors Q 3 and Q 4 , a first Zener diode, a second Zener diode, and a resistor R 1
- the third pin HO is connected to the gate of the MOS transistor Q 2
- the tenth pin LO of the chip U 1 is connected to the gate of the MOS transistor Q 1
- the first pin of the chip U 2 is connected to the capacitor C 4
- the third pin HO of the chip U 2 is connected to the gate of the MOS transistor Q 3
- the tenth pin LO of the chip U 2 is connected to the gate of the MOS transistor
- the other end of the Zener diode D 1 of the first U-chip access pin VCC 1, a chip U 2 are respectively connected to the second pin Zener diode D 2, the capacitor C 2, the other end of the capacitor C 2 chip access U 2 's fourth pin HS, regulated diode
- the other end of the access tube chip D 2 U VCC 2 of the first pin, chip and chip U 1 U 2 each are grounded VSS ninth pin, an eighth pin boost chip U IN 1 is connected to the microcontroller
- the signal terminal PWM-UP of the output frequency, the eighth pin IN of the chip U 2 is connected to the signal terminal PWM-DN of the buck output frequency of the microcontroller, and the seventh pin EN of the chip U 1 and the chip U 2 are connected.
- the MOS transistor Q 3 connects the chip U 1 and the MOS transistors Q 1 and Q 2 through the inductor L 1 , and the boost driving chip U 1 drives the MOS transistor Q 1 and the Q 2 boost output VOUT through the PWM output PWM-UP control signal of the microcontroller.
- the buck-boost circuit boost drive chip U 1 outputs a signal to turn on the MOS transistor Q 2 and is connected through the inductor L 1
- the chip U 2 , the MOS transistors Q 4 and Q 3 , and the buck driver chip U 2 drive the MOS transistor Q 4 and the Q 3 buck output VOUT through the PWM output PWM-DN control signal.
- Another technical solution of the present invention is a control method of the electronic smoking device heat generating device, which is special in that it comprises the following steps:
- the microcontroller determines whether the time when the switch is closed exceeds the set time, if not, proceeds to step (13), and if so, proceeds to the next step;
- step (13) The microcontroller starts working timing and judges whether the set working time is up to No. If yes, it proceeds to step (13), and if not, proceeds to the next step;
- the microcontroller starts measuring the resistance timing and determines whether the set interval time for measuring the resistance value of the heating unit is reached. If not, the timing is continued and judged, and if yes, the next step is entered;
- the resistance detecting module of the heating unit detects the resistance value of the heating unit, and the microcontroller calculates the corresponding temperature value according to the measured resistance value of the heating unit, and calculates the temperature change rate;
- step (7) comparing the temperature value with the set smoking temperature value, if equal to the set smoking temperature value, proceeding to the next step; if less than the set smoking temperature value, proceeding to step (9); If it is greater than the set smoking temperature value, proceed to step (10);
- step (10) reducing the voltage output of the buck-boost bridge circuit by the microcontroller, so that the power of the heat-generating unit is lowered, thereby lowering the temperature, and returning to step (4);
- step (12) comparing the temperature value with the set standby temperature value, if equal to the set standby temperature value, then proceeds to step (8); if less than the set standby temperature value, proceeds to step (9); If it is greater than the set standby temperature value, proceed to step (10);
- the heating device of the electronic smoking device is provided with a microcontroller, a battery power supply circuit, a buck-boost bridge circuit, a heating unit, a resistance sampling circuit of the heating unit, and a resistance detecting module of the heating unit, and the resistance value of the heating unit changes when the temperature changes.
- the heating unit resistance detecting module detects the resistance value of the heating unit and converts it into a corresponding temperature electrical signal and transmits the signal to the microcontroller, and the microcontroller sends a control signal according to the temperature electrical signal to the set temperature value.
- the buck-boost bridge circuit increases or decreases the output voltage of the buck-boost bridge circuit, and the power of the heat-generating unit changes accordingly to adjust the temperature of the heat-generating unit and maintain stability.
- the microcontroller sets the temperature setting values of smoking and standby to control the heating temperature of the heating unit during smoking and standby, which not only ensures the heating demand during normal smoking, but also avoids heating of the heating unit during standby.
- the temperature is too high and the cigarette is burnt.
- FIG. 1 is a circuit block diagram of a heat generating device of an electronic smoking article of the present invention
- FIG. 2 is a circuit schematic diagram of a resistance detecting module of a heat generating unit of the present invention
- Figure 3 is a circuit schematic diagram of the buck-boost bridge circuit of the present invention.
- FIG. 4 is a flow chart showing a control method of a heat generating device of the electronic smoking article of the present invention.
- Fig. 1 shows a heat generating device of an electronic smoking article of the present invention.
- the heating device of the electronic smoking device includes a microcontroller, a battery power supply circuit, a buck-boost bridge circuit, a heating unit, a resistance unit sampling circuit of the heating unit, and a resistance detecting module of the heating unit
- the battery power supply circuit includes Switch and rechargeable battery
- the microcontroller is electrically connected to the buck-boost circuit, the heating unit resistance sampling circuit, the heating unit, the heating unit resistance detecting module, and then connected back to the microcontroller, the heating unit sampling circuit and the resistance detection
- the module is connected, a feedback circuit is connected between the buck-boost bridge circuit and the heating unit, the feedback circuit is connected back to the microcontroller, the heating unit is electrically connected to the short-circuit detecting module, the short-circuit detecting module is connected to the microcontroller, and the micro-controller is electrically connected to the charging circuit.
- the charger is electrically connected to the charging voltage detecting module and then connected to the microcontroller.
- the charger is electrically connected to the charging circuit and the battery power supply circuit, and the battery power supply circuit supplies power to the microcontroller and the buck-boost bridge circuit respectively, and the microcontroller is connected to the auxiliary riser.
- the input end of the voltage module, the output end of the auxiliary boost module is connected to the buck-boost circuit, and the microcontroller is also electrically connected to the LED
- the temperature electrical signal is transmitted to the microcontroller, and the microcontroller outputs a control signal to the buck-boost bridge circuit according to the temperature electrical signal and the set temperature value, so that the output voltage of the buck-boost bridge circuit changes, the heating unit
- the power also changes to adjust the stability of the temperature of the heating unit.
- the heat generating unit is composed of a ceramic heating tube and a thermosensitive heating wire (not shown) provided on the ceramic heating tube, and the resistance of the thermistor wire changes with temperature, so the detection is performed.
- the resistance value can be used to calculate the corresponding temperature value.
- the heating device of the electronic smoking device of the present invention further includes an auxiliary boosting module.
- the microcontroller is connected to the input end of the auxiliary boosting module, and the output of the auxiliary boosting module is connected to the lifting and lowering bridge circuit.
- the auxiliary boost module is used to compensate or assist the buck-boost circuit for better boosting.
- the heat generating unit is electrically connected to the short circuit detecting module, and the short circuit detecting module is connected to the microcontroller.
- the short circuit detection module is used to detect whether the heat generating unit is short-circuited. If a short circuit occurs, the microcontroller can instruct the buck-boost bridge circuit to turn off the output, and the electronic smoking device stops working.
- the microcontroller is electrically connected to the charging circuit
- the charger is electrically connected to the charging voltage detecting module and then connected to the microcontroller
- the charger is electrically connected to the charging circuit and the battery power supply circuit, and the battery is connected.
- the power supply circuit supplies power to the microcontroller and the buck-boost bridge circuit, respectively.
- the charging voltage detection module operates during charging to prevent overcharging of the charger.
- the heating device of the electronic smoking device of the present invention is also electrically connected to the LED control module, the switch detection module and the motor vibration control module respectively, and the LED control module is used for controlling the LED indicator to perform different brightness on the smoking state. Or the indication of different colors or combinations thereof, the switch detection module is used for detecting the closed state or the closing time of the button switch, and the motor vibration control module is used for controlling the motor to vibrate when the machine is in the smoking state or when the machine is turned off to prompt the user.
- the heat generating unit resistance detecting module includes an operational amplifier U 4 , a resistor R 16 , a resistor R 17 , a capacitor C 12 , a resistor R 19 , a capacitor C 13 , a resistor R 22 , a capacitor C 14 , and a capacitor C 15 .
- the heating unit resistance sampling circuit includes a resistor R 18 , and the operational amplifier U 4 has a first pin REF, a second pin GND, a third pin VCC, a fourth pin IN+, a fifth pin IN-, and a sixth Pin OUT, the fourth pin IN+ of the operational amplifier U 4 is connected to the capacitor C 12 and the resistor R 17 respectively, and then connected to the output terminal VOUT of the buck-boost circuit, and the fifth pin IN- is connected to the capacitor C 12 and the resistor R 16 respectively .
- the sixth pin OUT of the operational amplifier U4 is connected to the resistor R 19 and then connected to the current detection signal IDET and the capacitor C 13 respectively , the other end of the capacitor C 13 is grounded, and the first pin REF and the second of the operational amplifier U 4 pin GND, a third operational amplifier pin VCC U 4 is connected to the resistor R 22 access auxiliary boost VCC-12V, the third pin 22 between VCC and the resistor R Junction capacitance are respectively connected to capacitors C 15 and C 14, C 15 and the capacitor capacitance C 14 of the other end; when the current through the resistor R 18, the both ends of the resistor R 18 will divide the voltage, via the resistor R 16, a resistor R 17, The capacitor C 12 is filtered once and input to
- the buck-boost circuit includes a chip U 1 , a chip U 2 , MOS transistors Q 1 and Q 2 , MOS transistors Q 3 and Q 4 , a first Zener diode, a second Zener diode, and a resistor.
- the first pin VCC of chip U 1 is connected to capacitor C 3 and grounded, chip U 1
- the third pin HO is connected to the gate of the MOS transistor Q 2
- the tenth pin LO of the chip U 1 is connected to the gate of the MOS transistor Q 1
- the first pin of the chip U 2 is connected to the capacitor C 4 and grounded.
- the third pin HO of the chip U 2 is connected to the gate of the MOS transistor Q 3
- the tenth pin LO of the chip U 2 is connected to the gate of the MOS transistor Q 4
- the fourth pin HS of the chip U 1 is passed through the inductor 1 U L access chips HS 2 of the fourth pin
- the second pin chip U 1 are connected to a Zener diode D
- capacitor C 1 the other end of the capacitor C 1 U chip access the fourth pin of the HS 1
- a chip U 2 are respectively connected to the second pin Zener diode D 2, the capacitor C 2, the other end of the capacitor C 2 U 2 chip access the fourth pin HS
- another Zener diode D 2 A first end of the access pin VCC 2 U chip, the chip U 1 and U 2 each chip ninth pin VSS are grounded, the output frequency of the signal boost eighth chip U IN 1 pin is connected to the microcontroller Terminal PWM-UP, the
- a method for controlling an electronic smoking device of the present invention includes the following steps:
- the microcontroller determines whether the switch closing time exceeds the set switching time (3 seconds), if not, proceeds to step (13), and if so, proceeds to the next step;
- the switch closing time does not exceed the set switching time for 3 seconds, indicating that the switch is accidentally touched, the buck-boost bridge circuit does not output, the heating unit of the electronic smoking device does not work, and the switch closing system is more than 3 seconds. Human operation.
- step (13) The microcontroller starts working timing and judges whether the set working time (3 minutes) is up to No. If yes, it proceeds to step (13), and if not, proceeds to the next step;
- the set working time of 3 minutes is the total time that a cigarette can be smoked. Exceeding this time indicates that the cigarette has been completely used, the suction cannot be continued, and the heating unit needs to stop working.
- the microcontroller starts measuring the resistance timing and determines whether the set interval time for measuring the resistance value of the heating unit is 3 ms. If not, it continues to count and judge, and if yes, proceeds to the next step;
- the resistance is measured because the resistance of the heating unit needs to be measured at intervals, and the interval is set to 3 ms in the microcontroller.
- the resistance detecting module of the heating unit detects the resistance value of the heating unit, and the microcontroller calculates the corresponding temperature value according to the measured resistance value of the heating unit, and calculates the temperature change rate;
- the corresponding temperature value can be calculated by measuring the resistance of the heating unit, and the temperature changes within a certain period of time. Calculate the rate of temperature change.
- the temperature change rate represents the speed of the temperature change
- the temperature change rate is larger, indicating that the temperature changes rapidly, while the temperature changes rapidly during smoking, and the temperature changes slowly during standby, and a temperature change can be set between the two. Rate values to distinguish the status of both.
- the set smoking temperature value indicates that the smoking temperature of the heating unit needs to be adjusted during smoking and stabilized at the set smoking temperature value.
- step (10) reducing the voltage output of the buck-boost bridge circuit by the microcontroller, so that the power of the heat-generating unit is lowered, thereby lowering the temperature, and returning to step (4);
- the temperature change rate is continuously lower than the set temperature change rate value, it means that the temperature change continues to be slow, that is, the standby is continued.
- the standby exceeds the set standby time, it means that the user no longer smokes, and the electronic smoking device needs to be turned off.
- step (12) comparing the temperature value with the set standby temperature value, if it is equal to the set standby temperature value, proceeding to step (8); if less than the set standby temperature value, proceeding to step (9); if greater than Set the standby temperature value, then proceed to step (10);
- the set standby temperature value is less than the set smoking temperature value.
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Abstract
电子烟具的发热装置及其控制方法。电子烟具的发热装置的微控制器依次电连接升降压桥电路、发热单元阻值采样电路、发热单元、发热单元阻值检测模块后连接回微控制器,发热单元采样电路与阻值检测模块连接,升降压桥电路与发热单元之间连接有反馈电路,反馈电路接回微控制器,当电子烟具在使用过程中,发热单元的温度变化时,阻值也相应发生变化,发热单元阻值检测模块检测发热单元的阻值并转换成相应的温度电信号传给微控制器,微控制器根据该温度电信号与设定的温度值比较后,发出控制信号给升降压桥电路,使升降压桥电路的输出电压发生变化,发热单元的功率也发生变化从而调整发热单元温度的稳定。
Description
本发明涉及一种电子烟具的技术领域,特别涉及一种电子烟具的发热装置及其控制方法。
一般的香烟是在明火燃烧时冒出香烟烟雾供吸烟者吸入口中的,而香烟明火燃烧时会分解产生烟焦油、一氧化碳、苯酚、氮氧化物、烯烃类物质、多环芳烃类物质等有害物质,这些物质会严重损害人体健康。
为避免香烟产生大量有害物质又能享受香烟的独有口味,市场上产生了一种可以辅助吸烟的电子烟具,其作用是吸烟用户吸烟时将烟草制品(如香烟、烟草芯)放在其中进行电发热,在低于烟草制品可燃烧的温度下对烟草制品进行烘烤直至冒烟,吸烟用户得以吸入香烟烟雾。由于烟草制品是通过发热冒烟而不是明火燃烧,避免了用户吸入烟草制品因明火燃烧产生的大量有害物质,故使用电子烟具进行吸烟得到广泛使用。
现有的电子烟具,无论在待机或吸烟状态,一般均通过发热管对香烟烟体的外壁进行恒电压发热,开始热传导比较慢,香烟烟体整体升温慢,导致吸出的烟雾量很小,但温度升高后,由于发热杯紧贴香烟烟体的外壁持续发热,热量通过香烟烟体的外壁向内部较慢传导,导致烟体外壁一侧温度过高,容易烧焦而产生焦味。
本发明的目的是提供一种电子烟具的发热装置,该发热装置可以调整发热温度的稳定。本发明的另一目的是提供一种电子烟具发热装置的控制方法。
本发明的技术解决方案是所述电子烟具的发热装置,其特殊之处在于,包括微控制器、电池供电电路,升降压桥电路、发热单元、发热单元阻值采样电路和发热单元阻值检测模块,所述电池供电电路包括开关和可充电的电池,所述微控制器依次电连接升降压桥电路、发热单元阻值采样电路、发热单元、发热单元阻值检测模块后接回微控制器,所述发热单元采样电路与所述阻值检测模块连接,所述升降压桥电路与所述发热单元之间连接有反馈电路,所述反馈电路接回微控制器,当电子烟具在使用过程中,发热单元的温度变化时阻值也相应发生变化,发热单元阻值检测模块检测发热单元的阻值并转换成相应的温度电信号传给微控制器,微控制器根据该温度电信号与设定的温度值比较后发出控制信号给所述升降压桥电路,使得升降压桥电路的输出电压发生变化,发热单元的功率也发生变化从而调整发热单元温度的稳定。
作为优选:还包括辅助升压模块,所述微控制器接入辅助升压模块的输入端,所述辅助升压模块的输出端接入升降压桥电路。
作为优选:所述发热单元电连接短路检测模块,所述短路检测模块接入所述微控制器。
作为优选:所述微控制器电连接充电电路,充电器电连接充电电压检测模块后接入微控制器,所述充电器电连接充电电路和电池供电电路,所述电池供电电路分别向微控制器和升降压桥电路供电。
作为优选:所述微控制器还分别电连接LED控制模块、开关检测模块和马达震动控制模块。
作为优选:所述发热单元阻值检测模块包括运放U
4、电阻R
16、电阻R
17、电容C
12、电阻R
19、电容C
13、电阻R
22、电容C
14和电容C
15,所述发热单元阻值采样电路包括电阻R
18,所述运放U
4具有第一引脚REF、第二引脚GND、第三引脚VCC、第四引脚IN+、第五引脚IN-和第六引脚OUT,运放U
4的第四引脚IN+分别连接电容C
12和电阻R
17后接入升降压桥电路输出端VOUT,第五引脚IN-分别连接电容C
12和电阻R
16后接入发热单元采样电路输出端PWM-OUT,电阻R
16与发热单元采样电路输出端PWM-OUT的连线结点和电阻R
17与升降压桥电路输出端VOUT的连线结点之间连接电阻R
18,运放U4的第六引脚OUT连接电阻R
19后分别接入电流检测信号IDET和电容C
13、电容C
13另一端接地,运放U
4的第一引脚REF和第二引脚GND接地,运放U
4的第三引脚VCC连接电阻R
22后接入辅助升压VCC-12V,第三引脚VCC与电阻R
22之间的结点分别连接电容C
15和电容C
14,电容C
15和电容C
14的另一端接地;当电流经过电阻R
18时,电阻R
18两端会分压,经过电阻R
16、电阻R
17、电容C
12进行一次滤波再输入到运放U
4,运放U
4对滤波后的电压进行放大并通过电阻R
19、电容C
13滤波,再通过电流检测信号IDET计算出发热单元的阻值。
作为优选:所述升降压桥电路包括芯片U
1、芯片U
2、MOS管Q
1和 Q
2、MOS管Q
3和 Q
4、第一稳压二极管、第二稳压二极管、电阻R
1、电阻R
2、电阻R
3、电容C
1、电容C
3、电容C
2、电容C
4和电感L
1,所述芯片U
1的第一引脚VCC连接电容C
3后接地,芯片U
1的第三引脚HO接入MOS管Q
2的栅极,芯片U
1的第十引脚LO接入MOS管Q
1的栅极,所述芯片U
2的第一引脚VCC连接电容C
4后接地,芯片U
2的第三引脚HO接入MOS管Q
3的栅极,芯片U
2的第十引脚LO接入MOS管Q
4的栅极,芯片U
1的第四引脚HS通过电感L
1接入芯片U
2的第四引脚HS,芯片U
1的第二引脚分别连接稳压二极管D
1、电容C
1,电容C
1另外一端接入芯片U
1的第四引脚HS,稳压二极管D
1另外一端接入芯片U
1的第一引脚VCC,芯片U
2的第二引脚分别连接稳压二极管D
2、电容C
2,电容C
2另外一端接入芯片U
2的第四引脚HS,稳压二极管D
2另外一端接入芯片U
2的第一引脚VCC,芯片U
1和芯片U
2各自的第九引脚VSS均接地,芯片U
1的第八引脚IN接微控制器的升压输出频率的信号端PWM-UP,芯片U
2的第八引脚IN接微控制器的降压输出频率的信号端PWM-DN,芯片U
1和芯片U
2各自的第七引脚EN均连接输出控制信号给升降压桥电路的输出控制信号端PWM-EN,芯片U
2第七引脚EN与输出控制信号端PWM-EN连线结点连接电阻R
3后接地,芯片U
1的第六引脚RDT接电阻R
1后接地,芯片U
2的第六引脚RDT接电阻R
2后接地;当电池电压低于输出电压时,升降压桥电路降压驱动芯片U
2输出信号打开MOS管Q
3,通过电感L
1连接芯片U
1、MOS管Q
1和Q
2,升压驱动芯片U
1通过微控制器输出PWM-UP控制信号驱动MOS管Q
1和Q
2升压输出VOUT;反之,当电池电压高于输出电压时,升降压桥电路升压驱动芯片U
1输出信号打开MOS管Q
2,通过电感L
1连接芯片U
2、MOS管Q
4和Q
3,降压驱动芯片U
2通过微控制器输出PWM-DN控制信号驱动MOS管Q
4和Q
3降压输出VOUT。
本发明的另一技术解决方案是所述电子烟具发热装置的控制方法,其特殊之处在于,包括以下步骤:
(1)当电子烟具开始工作时,微控制器判断开关闭合的时间是否超过设定的时间,如果否,则进入步骤(13),如果是,则进入下一步骤;
(2)升降压桥电路输出电压信号;
(3)微控制器开始工作计时并判断设定的工作时间到否,如果是,则进入步骤(13),如果否,则进入下一步骤;
(4)微控制器开始测电阻计时并判断是否达到测量发热单元的阻值的设定间隔时间,如果否,则继续计时并判断,如果是,则进入下一步骤;
(5)发热单元阻值检测模块检测发热单元阻值,微控制器根据测得的发热单元阻值计算出相应的温度值,同时计算出温度变化率;
(6)判断温度变化率是否大于或等于设定的温度变化率值,如果是,则说明电子烟具处于吸烟状态,进入下一步;如果否,则说明电子烟具处于待机状态,进入步骤(11);
(7)将所述温度值与设定的吸烟温度值进行比较,如果等于设定的吸烟温度值,则进入下一步骤;如果小于设定的吸烟温度值,则进入步骤(9);如果大于设定的吸烟温度值,则进入步骤(10);
(8)通过微控制器控制升降压桥电路保持电压输出,返回步骤(4);
(9)通过微控制器升高升降压桥电路的电压输出,使发热单元功率升高,从而升高温度,返回步骤(4);
(10)通过微控制器降低升降压桥电路的电压输出,使发热单元功率降低,从而降低温度,返回步骤(4);
(11)判断温度变化率持续小于设定的温度变化率值是否超过设定的待机时间,如果是,则进入步骤(13),如果否,则进入下一步骤;
(12)将所述温度值与设定的待机温度值进行比较,如果等于设定的待机温度值,则进入步骤(8);如果小于设定的待机温度值,则进入步骤(9);如果大于设定的待机温度值,则进入步骤(10);
(13)关闭升降压桥电路的电压输出,电子烟具停止工作。
该电子烟具的发热装置设有微控制器、电池供电电路,升降压桥电路、发热单元、发热单元阻值采样电路、发热单元阻值检测模块,发热单元的温度变化时阻值也相应发生变化,发热单元阻值检测模块检测发热单元的阻值并转换成相应的温度电信号传给微控制器,微控制器根据该温度电信号与设定的温度值比较后发出控制信号给所述升降压桥电路,使得升降压桥电路的输出电压升高或降低,发热单元的功率也相应发生变化从而调整发热单元温度并保持稳定。另外,微控制器设定了吸烟和待机两种温度设定值区别控制吸烟时和待机时发热单元的发热温度,既可保证正常吸烟时的发热需要,又可避免待机时发热单元一直加热导致温度过高而烧焦香烟。
图1是本发明电子烟具的发热装置的电路框图;
图2是本发明发热单元阻值检测模块的电路原理图;
图3是本发明升降压桥电路的电路原理图;
图4是本发明电子烟具的发热装置的控制方法流程图。
本发明下面将结合附图作进一步详述:
图1示出了本发明电子烟具的发热装置。
请参阅图1所示,该电子烟具的发热装置,包括微控制器、电池供电电路,升降压桥电路、发热单元、发热单元阻值采样电路和发热单元阻值检测模块,电池供电电路包括开关和可充电的电池,微控制器依次电连接升降压桥电路、发热单元阻值采样电路、发热单元、发热单元阻值检测模块后接回微控制器,发热单元采样电路与阻值检测模块连接,升降压桥电路与发热单元之间连接有反馈电路,反馈电路接回微控制器,发热单元电连接短路检测模块,短路检测模块接入微控制器,微控制器电连接充电电路,充电器电连接充电电压检测模块后接入微控制器,充电器电连接充电电路和电池供电电路,电池供电电路分别向微控制器和升降压桥电路供电,微控制器接入辅助升压模块的输入端,辅助升压模块的输出端接入升降压桥电路,微控制器还分别电连接LED控制模块、开关检测模块和马达震动控制模块;当电子烟具在使用过程中,发热单元的温度变化时阻值也相应发生变化,发热单元阻值检测模块检测发热单元的阻值并转换成相应的温度电信号传给微控制器,微控制器根据该温度电信号与设定的温度值比较后发出控制信号给升降压桥电路,使得升降压桥电路的输出电压发生变化,发热单元的功率也发生变化从而调整发热单元温度的稳定。
本发明电子烟具的发热装置中,发热单元由陶瓷发热管和陶瓷发热管上设有的热敏电热丝(图中未示)组成,热敏电热丝的电阻随温度变化而变化,因此检测其电阻阻值即可计算出对应的温度值。
请参阅图1所示,本发明电子烟具的发热装置,还包括辅助升压模块,微控制器接入辅助升压模块的输入端,辅助升压模块的输出端接入升降压桥电路。辅助升压模块用于补偿或辅助升降压桥电路以便进行更好地升压。
请参阅图1所示,本发明电子烟具的发热装置,发热单元电连接短路检测模块,短路检测模块接入微控制器。短路检测模块用于检测发热单元是否发生短路,如发生短路,则微控制器可以指令升降压桥电路关闭输出,电子烟具停止工作。
请参阅图1所示,本发明电子烟具的发热装置,微控制器电连接充电电路,充电器电连接充电电压检测模块后接入微控制器,充电器电连接充电电路和电池供电电路,电池供电电路分别向微控制器和升降压桥电路供电。充电电压检测模块在充电时工作,防止充电器发生过度充电。
请参阅图1所示,本发明电子烟具的发热装置,微控制器还分别电连接LED控制模块、开关检测模块和马达震动控制模块,LED控制模块用于控制LED指示灯对吸烟状态进行不同亮度或不同颜色或其组合的指示,开关检测模块用于对按键开关闭合状态或闭合时间进行检测,马达震动控制模块用于控制马达在开机后可以进入吸烟状态时或关机时进行震动以便提示用户。
请参阅图2所示,发热单元阻值检测模块包括运放U
4、电阻R
16、电阻R
17、电容C
12、电阻R
19、电容C
13、电阻R
22、电容C
14和电容C
15,发热单元阻值采样电路包括电阻R
18,运放U
4具有第一引脚REF、第二引脚GND、第三引脚VCC、第四引脚IN+、第五引脚IN-和第六引脚OUT,运放U
4的第四引脚IN+分别连接电容C
12和电阻R
17后接入升降压电路输出端VOUT,第五引脚IN-分别连接电容C
12和电阻R
16后接入发热单元采样电路输出端PWM-OUT,电阻R
16与发热单元采样电路输出端PWM-OUT的连线结点和电阻R
17与升降压电路输出端VOUT的连线结点之间连接电阻R
18,运放U4的第六引脚OUT连接电阻R
19后分别接入电流检测信号IDET和电容C
13、电容C
13另一端接地,运放U
4的第一引脚REF和第二引脚GND接地,运放U
4的第三引脚VCC连接电阻R
22后接入辅助升压VCC-12V,第三引脚VCC与电阻R
22之间的结点分别连接电容C
15和电容C
14,电容C
15和电容C
14的另一端接地;当电流经过电阻R
18时,电阻R
18两端会分压,经过电阻R
16、电阻R
17、电容C
12进行一次滤波再输入到运放U
4,运放U
4对滤波后的电压进行放大并通过电阻R
19、电容C
13滤波,再通过电流检测信号IDET计算出发热单元的阻值,即本发明检测电阻是通过检测电流来实现的。
请参阅图3所示,升降压桥电路包括芯片U
1、芯片U
2、MOS管Q
1和 Q
2、MOS管Q
3和 Q
4、第一稳压二极管、第二稳压二极管、电阻R
1、电阻R
2、电阻R
3、电容C
1、电容C
3、电容C
2、电容C
4和电感L
1,芯片U
1的第一引脚VCC连接电容C
3后接地,芯片U
1的第三引脚HO接入MOS管Q
2的栅极,芯片U
1的第十引脚LO接入MOS管Q
1的栅极,芯片U
2的第一引脚VCC连接电容C
4后接地,芯片U
2的第三引脚HO接入MOS管Q
3的栅极,芯片U
2的第十引脚LO接入MOS管Q
4的栅极,芯片U
1的第四引脚HS通过电感L
1接入芯片U
2的第四引脚HS,芯片U
1的第二引脚分别连接稳压二极管D
1、电容C
1,电容C
1另外一端接入芯片U
1的第四引脚HS,稳压二极管D
1另外一端接入芯片U
1的第一引脚VCC,芯片U
2的第二引脚分别连接稳压二极管D
2、电容C
2,电容C
2另外一端接入芯片U
2的第四引脚HS,稳压二极管D
2另外一端接入芯片U
2的第一引脚VCC,芯片U
1和芯片U
2各自的第九引脚VSS均接地,芯片U
1的第八引脚IN接微控制器的升压输出频率的信号端PWM-UP,芯片U
2的第八引脚IN接微控制器的降压输出频率的信号端PWM-DN,芯片U
1和芯片U
2各自的第七引脚EN均连接输出控制信号给升降压桥电路的输出控制信号端PWM-EN,芯片U
2第七引脚EN与输出控制信号端PWM-EN连线结点连接电阻R
3后接地,芯片U
1的第六引脚RDT接电阻R
1后接地,芯片U
2的第六引脚RDT接电阻R
2后接地;当电池电压低于输出电压时,升降压桥电路降压驱动芯片U
2输出信号打开MOS管Q
3,通过电感L
1连接芯片U
1、MOS管Q
1和Q
2,升压驱动芯片U
1通过微控制器输出PWM-UP控制信号驱动MOS管Q
1和Q
2升压输出VOUT;反之,当电池电压高于输出电压时,升降压桥电路升压驱动芯片U
1输出信号打开MOS管Q
2,通过电感L
1连接芯片U
2、MOS管Q
4和Q
3,降压驱动芯片U
2通过微控制器输出PWM-DN控制信号驱动MOS管Q
4和Q
3降压输出VOUT。
请参阅图4所示,本发明电子烟具发热装置的控制方法,包括以下步骤:
(1)当电子烟具开始工作时,微控制器判断开关闭合的时间是否超过设定的开关时间(3秒),如果否,则进入步骤(13),如果是,则进入下一步骤;
本步骤中,开关闭合的时间没有超过设定的开关时间3秒,则表明开关被误触碰,升降压桥电路不输出,电子烟具的发热单元不工作,超过3秒则表明开关闭合系人为操作。
(2)升降压桥电路输出电压信号;
本步骤中,升降压桥电路输出电压信号即发热单元开始工作。
(3)微控制器开始工作计时并判断设定的工作时间(3分钟)到否,如果是,则进入步骤(13),如果否,则进入下一步骤;
本步骤中,设定的工作时间3分钟是能够抽一支香烟的总时间,超过该时间则表明香烟已被完全使用,不可继续抽吸,发热单元需要停止工作。
(4)微控制器开始测电阻计时并判断是否达到测量发热单元的阻值的设定间隔时间3ms,如果否,则继续计时并判断,如果是,则进入下一步骤;
本步骤中,测电阻计时是因为测量发热单元的阻值需要间隔一段时间进行一次,该间隔时间3ms在微控制器中设定。
(5)发热单元阻值检测模块检测发热单元阻值,微控制器根据测得的发热单元阻值计算出相应的温度值,同时计算出温度变化率;
本步骤中,因为发热单元的电阻系热敏电阻,其发热温度与电阻阻值具有对应关系,测得发热单元的电阻即可计算出相应的温度值,在一定时间内温度发生变化,即可计算出温度变化率。
(6)判断温度变化率是否大于或等于设定的温度变化率值,如果是,则说明电子烟具处于吸烟状态,进入下一步;如果否,则说明电子烟具处于待机状态,进入步骤(11);
本步骤中,由于温度变化率代表了温度变化的快慢,温度变化率越大,则表明温度变化快,而吸烟时温度变化快,待机时温度变化慢,两者之间可以设定一个温度变化率值来区分两者的状态。
(7)将温度值与设定的吸烟温度值进行比较,如果等于设定的吸烟温度值,则进入下一步骤;如果小于设定的吸烟温度值,则进入步骤(9);如果大于设定的吸烟温度值,则进入步骤(10);
本步骤中,设定的吸烟温度值表示吸烟时需要调节发热单元的吸烟温度并稳定在设定的吸烟温度值。
(8)通过微控制器控制升降压桥电路保持电压输出,返回步骤(4);
(9)通过微控制器升高升降压桥电路的电压输出,使发热单元功率升高,从而升高温度,返回步骤(4);
(10)通过微控制器降低升降压桥电路的电压输出,使发热单元功率降低,从而降低温度,返回步骤(4);
(11)判断温度变化率持续小于设定的温度变化率值是否超过设定的待机时间,如果是,则进入步骤(13),如果否,则进入下一步骤;
本步骤中,温度变化率持续小于设定的温度变化率值即表示温度变化持续慢,即持续待机,当待机超过设定的待机时间时,表示用户不再吸烟,需要将电子烟具关机。
(12)将温度值与设定的待机温度值进行比较,如果等于设定的待机温度值,则进入步骤(8);如果小于设定的待机温度值,则进入步骤(9);如果大于设定的待机温度值,则进入步骤(10);
本步骤中,在设定的待机时间内,同样需要调节待机温度并稳定在设定的待机温度值。设定的待机温度值小于设定的吸烟温度值。
(13)关闭升降压桥电路的电压输出,电子烟具停止工作。
以上所述仅为本发明的较佳实施例,凡依本发明权利要求范围所做的均等变化与修饰,皆应属本发明权利要求的涵盖范围。
Claims (8)
- 一种电子烟具的发热装置,其特征在于,包括微控制器、电池供电电路,升降压桥电路、发热单元、发热单元阻值采样电路和发热单元阻值检测模块,所述电池供电电路包括开关和可充电的电池,所述微控制器依次电连接升降压桥电路、发热单元阻值采样电路、发热单元、发热单元阻值检测模块后接回微控制器,所述发热单元采样电路与所述阻值检测模块连接,所述升降压桥电路与所述发热单元之间连接有反馈电路,所述反馈电路接回微控制器,当电子烟具在使用过程中,发热单元的温度变化时阻值也相应发生变化,发热单元阻值检测模块检测发热单元的阻值并转换成相应的温度电信号传给微控制器,微控制器根据该温度电信号与设定的温度值比较后发出控制信号给所述升降压桥电路,使得升降压桥电路的输出电压发生变化,发热单元的功率也发生变化从而调整发热单元温度的稳定。
- 根据权利要求1所述电子烟具的发热装置,其特征在于,还包括辅助升压模块,所述微控制器接入辅助升压模块的输入端,所述辅助升压模块的输出端接入升降压桥电路。
- 根据权利要求1所述电子烟具的发热装置,其特征在于,所述发热单元电连接短路检测模块,所述短路检测模块接入所述微控制器。
- 根据权利要求1所述电子烟具的发热装置,其特征在于,所述微控制器电连接充电电路,充电器电连接充电电压检测模块后接入微控制器,所述充电器电连接充电电路和电池供电电路,所述电池供电电路分别向微控制器和升降压桥电路供电。
- 根据权利要求1所述电子烟具的发热装置,其特征在于,所述微控制器还分别电连接LED控制模块、开关检测模块和马达震动控制模块。
- 根据权利要求1所述电子烟具的发热装置,其特征在于,所述发热单元阻值检测模块包括运放U 4、电阻R 16、电阻R 17、电容C 12、电阻R 19、电容C 13、电阻R 22、电容C 14和电容C 15,所述发热单元阻值采样电路包括电阻R 18,所述运放U 4具有第一引脚REF、第二引脚GND、第三引脚VCC、第四引脚IN+、第五引脚IN-和第六引脚OUT,运放U 4的第四引脚IN+分别连接电容C 12和电阻R 17后接入升降压桥电路输出端VOUT,第五引脚IN-分别连接电容C 12和电阻R 16后接入发热单元采样电路输出端PWM-OUT,电阻R 16与发热单元采样电路输出端PWM-OUT的连线结点和电阻R 17与升降压桥电路输出端VOUT的连线结点之间连接电阻R 18,运放U 4的第六引脚OUT连接电阻R 19后分别接入电流检测信号IDET和电容C 13、电容C 13另一端接地,运放U 4的第一引脚REF和第二引脚GND接地,运放U 4的第三引脚VCC连接电阻R 22后接入辅助升压VCC-12V,第三引脚VCC与电阻R 22之间的结点分别连接电容C 15和电容C 14,电容C 15和电容C 14的另一端接地;当电流经过电阻R 18时,电阻R 18两端会分压,经过电阻R 16、电阻R 17、电容C 12进行一次滤波再输入到运放U 4,运放U 4对滤波后的电压进行放大并通过电阻R 19、电容C 13滤波,再通过电流检测信号IDET计算出发热单元的阻值。
- 根据权利要求1所述电子烟具的发热装置,其特征在于,所述升降压桥电路包括芯片U 1、芯片U 2、MOS管Q 1和 Q 2、MOS管Q 3和 Q 4、第一稳压二极管、第二稳压二极管、电阻R 1、电阻R 2、电阻R 3、电容C 1、电容C 3、电容C 2、电容C 4和电感L 1,所述芯片U 1的第一引脚VCC连接电容C 3后接地,芯片U 1的第三引脚HO接入MOS管Q 2的栅极,芯片U 1的第十引脚LO接入MOS管Q 1的栅极,所述芯片U 2的第一引脚VCC连接电容C 4后接地,芯片U 2的第三引脚HO接入MOS管Q 3的栅极,芯片U 2的第十引脚LO接入MOS管Q 4的栅极,芯片U 1的第四引脚HS通过电感L 1接入芯片U 2的第四引脚HS,芯片U 1的第二引脚分别连接稳压二极管D 1、电容C 1,电容C 1另外一端接入芯片U 1的第四引脚HS,稳压二极管D 1另外一端接入芯片U 1的第一引脚VCC,芯片U 2的第二引脚分别连接稳压二极管D 2、电容C 2,电容C 2另外一端接入芯片U 2的第四引脚HS,稳压二极管D 2另外一端接入芯片U 2的第一引脚VCC,芯片U 1和芯片U 2各自的第九引脚VSS均接地,芯片U 1的第八引脚IN接微控制器的升压输出频率的信号端PWM-UP,芯片U 2的第八引脚IN接微控制器的降压输出频率的信号端PWM-DN,芯片U 1和芯片U 2各自的第七引脚EN均连接输出控制信号给升降压桥电路的输出控制信号端PWM-EN,芯片U 2第七引脚EN与输出控制信号端PWM-EN连线结点连接电阻R 3后接地,芯片U 1的第六引脚RDT接电阻R 1后接地,芯片U 2的第六引脚RDT接电阻R 2后接地;当电池电压低于输出电压时,升降压桥电路降压驱动芯片U 2输出信号打开MOS管Q 3,通过电感L 1连接芯片U 1、MOS管Q 1和Q 2,升压驱动芯片U 1通过微控制器输出PWM-UP控制信号驱动MOS管Q 1和Q 2升压输出VOUT;反之,当电池电压高于输出电压时,升降压桥电路升压驱动芯片U 1输出信号打开MOS管Q 2,通过电感L 1连接芯片U 2、MOS管Q 4和Q 3,降压驱动芯片U 2通过微控制器输出PWM-DN控制信号驱动MOS管Q 4和Q 3降压输出VOUT。
- 一种根据权利要求1-7任一项所述电子烟具的发热装置的控制方法,其特征在于,包括以下步骤:(1)当电子烟具开始工作时,微控制器判断开关闭合的时间是否超过设定的开关时间,如果否,则进入步骤(13),如果是,则进入下一步骤;(2)升降压桥电路输出电压信号;(3)微控制器开始工作计时并判断设定的工作时间到否,如果是,则进入步骤(13),如果否,则进入下一步骤;(4)微控制器开始测电阻计时并判断是否达到测量发热单元的阻值的设定间隔时间,如果否,则继续计时并判断,如果是,则进入下一步骤;(5)发热单元阻值检测模块检测发热单元阻值,微控制器根据测得的发热单元阻值计算出相应的温度值,同时计算出温度变化率;(6)判断温度变化率是否大于或等于设定的温度变化率值,如果是,则说明电子烟具处于吸烟状态,进入下一步;如果否,则说明电子烟具处于待机状态,进入步骤(11);(7)将所述温度值与设定的吸烟温度值进行比较,如果等于设定的吸烟温度值,则进入下一步骤;如果小于设定的吸烟温度值,则进入步骤(9);如果大于设定的吸烟温度值,则进入步骤(10);(8)通过微控制器控制升降压桥电路保持电压输出,返回步骤(4);(9)通过微控制器升高升降压桥电路的电压输出,使发热单元功率升高,从而升高温度,返回步骤(4);(10)通过微控制器降低升降压桥电路的电压输出,使发热单元功率降低,从而降低温度,返回步骤(4);(11)判断温度变化率持续小于设定的温度变化率值是否超过设定的待机时间,如果是,则进入步骤(13),如果否,则进入下一步骤;(12)将所述温度值与设定的待机温度值进行比较,如果等于设定的待机温度值,则进入步骤(8);如果小于设定的待机温度值,则进入步骤(9);如果大于设定的待机温度值,则进入步骤(10);(13)关闭升降压桥电路的电压输出,电子烟具停止工作。
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