CN207236087U - The anti-dry burning device of electronic cigarette - Google Patents

The anti-dry burning device of electronic cigarette Download PDF

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Publication number
CN207236087U
CN207236087U CN201721018731.4U CN201721018731U CN207236087U CN 207236087 U CN207236087 U CN 207236087U CN 201721018731 U CN201721018731 U CN 201721018731U CN 207236087 U CN207236087 U CN 207236087U
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circuit
resistance
microcontroller
atomizer
capacitance
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CN201721018731.4U
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林光榕
郑贤彬
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Huizhou New Technology Co Ltd
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Huizhou New Technology Co Ltd
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Abstract

It the utility model is related to a kind of anti-dry burning device of electronic cigarette, the microcontroller of the anti-dry burning device is sequentially connected electrically half-bridge booster circuit, chopping depressuring circuit, atomizer, atomizer resistance value detection module and then takes back microcontroller, feedback circuit is connected between chopping depressuring circuit and atomizer between chopping depressuring circuit and half-bridge booster circuit, feedback circuit accesses microcontroller；Feedback circuit feeds back the output voltage signal of half-bridge booster circuit and chopping depressuring circuit respectively; to adjust the output voltage of half-bridge booster circuit and chopping depressuring circuit and to keep stable; when electronic cigarette works; atomizer resistance value detection module continuously detects the resistance value of atomizer according to the interval setting time of microcontroller; when the number that the resistance value of atomizer exceedes dry combustion method protection setting resistance value and continues to exceed reaches setting number; micro-controller instructions half-bridge booster circuit or chopping depressuring circuit close output, and electronic cigarette is automatically stopped work.

Description

The anti-dry burning device of electronic cigarette
Technical field
A kind of electronic cigarette technical field is the utility model is related to, more particularly to a kind of anti-dry burning device of electronic cigarette.
Background technology
Existing electronic cigarette generally comprise suction nozzle, housing and the device for storing liquid being set in housing, atomizing component, power supply and Circuit control panel, and dry combustion method protection module of not setting up defences.Existing electronic cigarette, be required for adding manually after tobacco juice is finished tobacco juice or Device for storing liquid is replaced, can be continuing with, when the tobacco juice in device for storing liquid is finished, user is without addition tobacco juice or replacement in time Device for storing liquid and when continuing smoking, the circuit of circuit control panel control continues to work so that the heating unit in atomizing component Dry combustion method occurs because lacking tobacco juice and causing temperature drastically to raise, so as to produce pernicious gas and the smell of burning is inhaled into human body, there is victimization Body health, the heat in addition drastically produced, which is conducted to remaining position of electronic cigarette, also easily burns out electronic cigarette or scald human skin.
Utility model content
The purpose of this utility model is to provide a kind of tobacco juice worked as in electronic cigarette device for storing liquid and is finished and user's continuation smoking When, the anti-dry burning device of the electronic cigarette of dry combustion method will not occur.
The technical solution of the utility model is the anti-dry burning device of the electronic cigarette, it is characterized in that, including Microcontroller, half-bridge booster circuit, chopping depressuring circuit, atomizer, atomizer resistance value detection module, battery feed circuit, institute State battery feed circuit include switch and rechargeable battery, the microcontroller be sequentially connected electrically the half-bridge booster circuit, Then chopping depressuring circuit, atomizer, atomizer resistance value detection module take back microcontroller, the chopping depressuring circuit with it is described The first feedback circuit is connected between atomizer, second is connected between the chopping depressuring circuit and the half-bridge booster circuit Feedback circuit, first feedback circuit and the second feedback circuit are respectively connected to microcontroller, and microcontroller is electrically connected copped wave drop Volt circuit；The output voltage signal of the second feedback circuit feedback half-bridge booster circuit, so that microcontroller adjusts half-bridge liter The output voltage of volt circuit simultaneously keeps stable, the output voltage signal of the first feedback circuit feedback chopping depressuring circuit, with Just microcontroller adjusts the output voltage of chopping depressuring circuit and keeps stable；When electronic cigarette works, the detection of atomizer resistance value Module continuously detects the resistance value of atomizer according to the interval setting time of microcontroller, when the resistance value of atomizer continues to exceed dry combustion method When the number that protection sets resistance value and continues to exceed reaches setting number, micro-controller instructions half-bridge booster circuit or copped wave drop Volt circuit closes output, and electronic cigarette is stopped.
As preferred：The atomizer is also electrically connected current detection module, the current detection module and the atomizer Resistance value detection module is respectively connected to short-circuit detecting module, and the short-circuit detecting module accesses microcontroller.
As preferred：Charging circuit, charger, charger voltage detection module are further included, the microcontroller is electrically connected Charging circuit, the charger are electrically connected charger voltage detection module and are followed by into microcontroller, and the charger is also electric successively Power respectively to microcontroller and half-bridge booster circuit after connecting charging circuit, battery feed circuit；The microcontroller also divides Not Lian Jie LED control module, switch detection module and auxiliary boost module, the auxiliary boost module accesses the half-bridge boosting Circuit.
As preferred：It is additionally provided with temperature sensor and battery temperature detection module, during charging, the temperature sensor detection The temperature signal of battery simultaneously accesses the battery temperature detection module, then accesses microcontroller by the battery feed circuit, When temperature signal exceedes design temperature value range, micro-controller instructions charging circuit stops charging；During electric discharge, the temperature passes When sensor detects that temperature signal exceedes design temperature value range, micro-controller instructions half-bridge booster circuit or chopping depressuring circuit Output is closed, electronic cigarette is stopped.
As preferred：The half-bridge booster circuit includes main control chip U3, inductance L1, capacitance C1With capacitance C2, main control chip U3Including the 4th pin VSW, the 4th pin VSW is through inductance L1Capacitance C is connected respectively2, capacitance C1One end and anode BAT+, the capacitance C2With capacitance C1The other end be grounded；The half-bridge booster circuit further includes capacitance C3, capacitance C4, its In, the chip U3Including the 5th pin VIN, the 5th pin VIN connects capacitance C respectively3, capacitance C4One end and half-bridge it is defeated Outlet VOUT, capacitance C3With capacitance C4The other end be grounded；The main control chip U3Inside includes two N-MOS and manages, the master Control chip U3Equipped with the 8th pin PWM to input the PWM-IN signals of the first setpoint frequency, the control of PWM-IN signals is described two N-MOS pipes reach boosting, by the 5th pin VIN output voltages to half-bridge output terminal VOUT, while pass through the second feedback circuit Signal adjusts the frequency of PWM-IN signals, makes the voltage stabilization of half-bridge output terminal VOUT to setting voltage V1。
As preferred：The chopping depressuring circuit includes metal-oxide-semiconductor Q2, resistance R18, triode Q3, resistance R20, pull down resistor R7, chopping depressuring output terminal PWM_OUT and the second setpoint frequency output terminal OUT_PWM, the half-bridge output terminal VOUT difference It is electrically connected metal-oxide-semiconductor Q2Source S, resistance R18, the resistance R18Access metal-oxide-semiconductor Q2Grid G and triode Q3Collector 3, Metal-oxide-semiconductor Q2Drain D access chopping depressuring output terminal PWM_OUT, the triode Q3Emitter 2 be grounded, triode Q3Base Pole 1 is through resistance R20After be respectively connected to pull down resistor R7One end and the second setpoint frequency output terminal OUT_PWM；Described second sets The output terminal OUT_PWM for determining frequency accesses the microcontroller, pull down resistor R7The other end ground connection.
As preferred：The atomizer resistance value detection module includes anode BAT+, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q4, resistance R12, resistance R14, test switch TEST_R, reference resistance R15, resistance R16, resistance R17, resistance R21With capacitance C17, microcontroller R_ DET ends, the anode BAT+ connect metal-oxide-semiconductor Q respectively1Source electrode 2 and resistance R12, resistance R12The other end respectively and MOS Pipe Q1Grid 1, metal-oxide-semiconductor Q4Grid 1 and resistance R14, the resistance R14Other end connecting test switchs TEST_R, metal-oxide-semiconductor Q1 Drain electrode 3 and metal-oxide-semiconductor Q4Drain electrode 3 connect, metal-oxide-semiconductor Q4Source electrode 2 connect reference resistance R15, resistance R16It is followed by into microcontroller R_DET ends, reference resistance R15With resistance R16Between node connect chopping depressuring output terminal PWM_OUT and resistance R respectively17, electricity Hinder R17The other end ground connection, resistance R16Node between microcontroller R_DET ends is connected resistance R respectively21, capacitance C17, resistance R21With capacitance C17The other end ground connection；When surveying dry combustion method, microcontroller connects test switch TEST_R signals, closure metal-oxide-semiconductor Q1With Q4, microcontroller is according to reference resistance R15The AD magnitudes of voltage for detecting microcontroller R_DET ends at the same time flow through reference resistance to calculate R15Current value, then calculate the resistance of atomizer.
As preferred：The short-circuit detecting module includes resistance R19, resistance R22, capacitance C15, CON1 terminals, atomizer bear Pole F-, short-circuit detecting point SHORT_DET, series resistance R between the short-circuit detecting point SHORT_DET and the CON1 terminals19、 The short-circuit detecting point SHORT_DET is also connected with capacitance C15, the capacitance C15Other end ground connection, the CON1 terminals also divide Lian Jie not F- and resistance R22, resistance R22The other end ground connection；The short-circuit detecting module is by detecting short-circuit resistance R22On pressure Drop, then the current value of short-circuit detecting point SHORT_DET is detected by the microcontroller and judges whether to set more than short-circuit protection Constant current value, the output as closed half-bridge booster circuit or chopping depressuring circuit by microcontroller more than if, electronic cigarette stop Work.
As preferred：First setpoint frequency is 100K~300KHz, the setting voltage V1For 3.0~5.5V.
As preferred：Second setpoint frequency is 30~100Hz.
As preferred：The dry combustion method protection sets resistance value as 0.05~6.0 ohm, and the number that sets is at least 1 time.
Compared with prior art, the beneficial effects of the utility model:
The electronic cigarette is equipped with anti-dry burning device, is provided with half-bridge booster circuit, chopping depressuring circuit and atomizer resistance value Detection module, can detect the resistance value signal of the fever bulk resistor in atomizer, when atomizer works on because lacking tobacco juice, The number that the resistance value of atomizer exceedes dry combustion method protection setting resistance value and continues to exceed is caused to reach setting when temperature drastically raises During number, the anti-dry burning device of electronic cigarette judges and the power supply of cut-out half-bridge booster circuit or chopping depressuring circuit is defeated in time Go out, prevent atomizer from dry combustion method occurs, so as to prevent pernicious gas and the smell of burning to be inhaled into human body and be detrimental to health, and avoid Electronic cigarette is burned or scalds human body.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the anti-dry burning device of the utility model electronic cigarette；
Fig. 2 is the circuit diagram of half-bridge booster circuit in the utility model；
Fig. 3 is the circuit diagram of chopping depressuring circuit in the utility model；
Fig. 4 is the circuit diagram of atomizer resistance value detection module in the utility model；
Fig. 5 is the circuit diagram of short-circuit detecting module in the utility model；
Fig. 6 is the flow chart of the utility model electronic cigarette anti-dry control method.
Embodiment
The utility model is described in further detail below in conjunction with attached drawing：
Fig. 1 shows the anti-dry burning device of the utility model electronic cigarette.
Refering to Figure 1, the anti-dry burning device of the utility model electronic cigarette, including the boosting of microcontroller, that is, MCU, half-bridge Circuit, chopping depressuring circuit, atomizer, atomizer resistance value detection module, battery feed circuit, battery feed circuit include switch With rechargeable battery (not shown), microcontroller is sequentially connected electrically half-bridge booster circuit, chopping depressuring circuit, atomization Then device, atomizer resistance value detection module take back microcontroller, first is connected between chopping depressuring circuit and the atomizer Feedback circuit, is connected with the second feedback circuit, the first feedback circuit and second between chopping depressuring circuit and half-bridge booster circuit Feedback circuit is respectively connected to microcontroller, and microcontroller is electrically connected chopping depressuring circuit；The feedback half-bridge boosting of second feedback circuit The output voltage signal of circuit, so that microcontroller adjusts the output voltage of half-bridge booster circuit and keeps stable, the first feedback The output voltage signal of electronic feedback chopping depressuring circuit, output voltage and guarantor so as to microcontroller adjustment chopping depressuring circuit It is fixed to keep steady；When electronic cigarette works, the interval setting time that atomizer resistance value detection module is set according to microcontroller is continuously examined The resistance value of atomizer is surveyed, i.e. atomizer resistance value detection module such as detects primary atomizations by interval setting time at interval of 20 milliseconds The resistance value of device, when the resistance value of the atomizer detected continues to exceed dry combustion method protection such as 2 ohm of resistance value of setting and continues to exceed When the setting resistance value reaches setting number such as 5 times, micro-controller instructions chopping depressuring circuit closes output, and electronic cigarette stops automatically Only work.Above-mentioned setting detected resistance, which continues to exceed dry combustion method protection setting resistance value and continues to exceed the setting resistance value, reaches setting time Several meanings are, the rise of atomizer resistance value can be caused to cause unnecessary dry combustion method to be protected to avoid accidental factor.Because sometimes When also having tobacco juice that dry combustion method will not occur in electronic cigarette, there are accidentalia to cause an atomizer resistance value moment measured twice once in a while More than the setting resistance value of dry combustion method protection, if such a situation starts dry combustion method protection and closes down the work of electronic cigarette, it is clear that be not inconsistent Actual conditions are closed, bad usage experience is brought to user.Only when the atomizer resistance value that continuous several times detect exceedes Dry combustion method protection setting resistance value, and reach setting number when, could really reflect the objective circumstances of dry combustion method, be closed down at this time Dry combustion method protection can just be carried out.
In the anti-dry burning device of the utility model electronic cigarette, atomizer is including the temperature-sensitive heating wire in heat-generating units (in figure Do not show), the resistance of temperature-sensitive heating wire is varied with temperature and changed, therefore is detected its resistance and can be calculated corresponding temperature Value.
Refering to Figure 1, atomizer is also electrically connected current detection module, current detection module is detected with atomizer resistance value Module is respectively connected to short-circuit detecting module, short-circuit detecting module access microcontroller.Short-circuit detecting module is used to detect atomizer Temperature-sensitive heating wire whether short circuit occurs, such as occur short circuit, then microcontroller can instruct half-bridge booster circuit or chopping depressuring Circuit is closed output and is protected, and electronic cigarette is stopped.Half-bridge booster circuit is powered for chopping depressuring circuit, closes half-bridge liter While volt circuit namely close chopping depressuring circuit.
Refering to Figure 1, the anti-dry burning device of the electronic cigarette, further includes charging circuit, charger, charger voltage inspection Module is surveyed, microcontroller is electrically connected charging circuit, and charger is electrically connected charger voltage detection module and is followed by, into microcontroller, filling Electric appliance is also sequentially connected electrically after charging circuit, battery feed circuit powers to microcontroller and half-bridge booster circuit respectively；Micro-control Device processed is also respectively connected with LED control module, switch detection module and auxiliary boost module, the access half-bridge boosting of auxiliary boost module Circuit.Auxiliary boost module is used to aid in half-bridge booster circuit to boost.Charging voltage detection module works in charging, prevents from filling Electric appliance overcharges.LED control module is used to control LED light to carry out different brightness or different colours to smoking state Or the instruction of its combination, switch detection module are used to be detected key switch closure state or closing time, auxiliary boost Module is used for compensation or assistance for lifting breaking the bridge circuit preferably to be boosted.
Refering to Figure 1, the anti-dry burning device of the utility model electronic cigarette, is additionally provided with temperature sensor and battery temperature Detection module, during charging, the temperature signal of temperature sensor monitoring cell simultaneously accesses battery temperature detection module, then passes through battery Power supply circuit accesses microcontroller, and when temperature signal exceedes design temperature value range, micro-controller instructions charging circuit stops Charging；During electric discharge, when temperature sensor detects that temperature signal exceedes design temperature value range, the boosting of micro-controller instructions half-bridge Circuit or chopping depressuring circuit close output, and electronic cigarette is stopped.Battery temperature detection module be used for detect battery charging and Temperature during electric discharge, avoids the excessive danger for being damaged or exploding of battery temperature.
Refer to shown in Fig. 2, half-bridge booster circuit includes main control chip U3, inductance L1, capacitance C1With capacitance C2, master control core Piece U3Including the 4th pin VSW, the 4th pin VSW is through inductance L1Capacitance C is connected respectively2, capacitance C1One end and anode BAT +, capacitance C2With capacitance C1The other end be grounded；Half-bridge booster circuit further includes capacitance C3, capacitance C4, wherein, chip U3Including 5th pin VIN, the 5th pin VIN connect capacitance C respectively3, capacitance C4One end and half-bridge output terminal VOUT, capacitance C3And capacitance C4The other end be grounded；Main control chip U3Inside includes two N-MOS and manages, main control chip U3Equipped with the 8th pin PWM so as to defeated Enter the PWM-IN signals of the first setpoint frequency, PWM-IN signals control two N-MOS pipes to reach boosting, defeated by the 5th pin VIN Go out voltage to half-bridge output terminal VOUT, while the frequency for the signal adjustment PWM-IN signals for passing through the second feedback circuit, make half-bridge The voltage stabilization of output terminal VOUT to setting voltage V1, above-mentioned first setpoint frequency is 100K~300KHz, above-mentioned setting voltage V1 For 3.0~5.5V.
Refer to shown in Fig. 3, chopping depressuring circuit includes metal-oxide-semiconductor Q2, resistance R18, triode Q3, resistance R20, pull down resistor R7, chopping depressuring output terminal PWM_OUT and the second setpoint frequency output terminal OUT_PWM, half-bridge output terminal VOUT is electrically connected respectively Meet metal-oxide-semiconductor Q2Source S, resistance R18, resistance R18Access metal-oxide-semiconductor Q2Grid G and triode Q3Collector 3, metal-oxide-semiconductor Q2's Drain D access chopping depressuring output terminal PWM_OUT, triode Q3Emitter 2 be grounded, triode Q3Base stage 1 through resistance R20 After be respectively connected to pull down resistor R7One end and the second setpoint frequency output terminal OUT_PWM；The output terminal of second setpoint frequency OUT_PWM accesses microcontroller, pull down resistor R7The other end ground connection, above-mentioned second setpoint frequency is 30~100Hz.
Refer to shown in Fig. 4, atomizer resistance value detection module includes anode BAT+, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q4, resistance R12, resistance R14, test switch TEST_R, reference resistance R15, resistance R16, resistance R17, resistance R21With capacitance C17, microcontroller R_ DET ends, anode BAT+ connect metal-oxide-semiconductor Q respectively1Source electrode 2 and resistance R12, resistance R12The other end respectively with metal-oxide-semiconductor Q1 Grid 1, metal-oxide-semiconductor Q4Grid 1 and resistance R14, resistance R14Other end connecting test switchs TEST_R, metal-oxide-semiconductor Q1Drain electrode 3 With metal-oxide-semiconductor Q4Drain electrode 3 connect, metal-oxide-semiconductor Q4Source electrode 2 connect reference resistance R15, resistance R16It is followed by into microcontroller R_DET End, reference resistance R15With resistance R16Between node connect chopping depressuring output terminal PWM_OUT and resistance R respectively17, resistance R17 The other end ground connection, resistance R16Node between microcontroller R_DET ends is connected resistance R respectively21, capacitance C17, resistance R21With Capacitance C17The other end ground connection；The utility model detection resistance is realized by detecting electric current.When surveying dry combustion method, microcontroller Connect test switch TEST_R signals, closure metal-oxide-semiconductor Q1And Q4, microcontroller is according to reference resistance R15Detect microcontroller at the same time The AD magnitudes of voltage at R_DET ends flow through reference resistance R to calculate15Current value, then calculate the resistance of atomizer, judge Whether the resistance value of atomizer exceedes the setting resistance value of dry combustion method protection, and the setting number for continuing to exceed dry combustion method protection setting resistance value is sentenced Break and chopping depressuring output terminal chopping depressuring output terminal PWM_OUT is exported and is closed for dry-fire condition, microcontroller, electronic cigarette stops Work, above-mentioned dry combustion method protection set resistance value as 0.05~6.0 ohm, and the number that sets that resistance value is set more than dry combustion method protection is at least 1 time.
Refer to shown in Fig. 5, short-circuit detecting module includes resistance R19, resistance R22, capacitance C15, CON1 terminals, atomizer bear Pole F-, short-circuit detecting point SHORT_DET, series resistance R between short-circuit detecting point SHORT_DET and CON1 terminals19, short-circuit detecting Point SHORT_DET is also connected with capacitance C15, capacitance C15Other end ground connection, CON1 terminals are also respectively connected with F- and resistance R22, resistance R22The other end ground connection；Short-circuit detecting module is by detecting short-circuit resistance R22On pressure drop, then pass through microcontroller detection short circuit The current value of test point SHORT_DET simultaneously judges whether to exceed short-circuit protection setting electric current value, as passed through microcontroller more than if The output of half-bridge booster circuit or chopping depressuring circuit is closed, electronic cigarette is automatically stopped work.
Refer to shown in Fig. 6, the anti-dry burning device of the utility model electronic cigarette so works, i.e., its anti-dry controls Method, comprises the following steps：
(1) when electronic cigarette is started to work, microcontroller judges whether the time of switch closure exceedes the time of setting such as 0.3 second, if it is not, then enter step (10), if it is, into next step；
In this step, the time for switching closure is not above 0.3 second switch time of setting, then shows switch by false touch Touch, chopping depressuring circuit does not export, and the atomizer heat-generating units of electronic cigarette do not work, and then shows to switch closed system more than 0.3 second Manual operation.
(2) microprocessor control chopping depressuring circuit output operating voltage；
In this step, chopping depressuring circuit output voltage signal, that is, atomizer is started to work.
Microcontroller by the resistance value of atomizer continue to exceed dry combustion method protection setting resistance value number be calculated as zero；
(4) microcontroller starts timing and judges whether the milli of interval setting time such as 20 for reaching the resistance value of measurement atomizer Second, if it is not, then continue timing and to judge, if it is, into next step；
In this step, measuring resistance timing is to need certain interval of time to carry out once because of the resistance value for measuring heat-generating units, The interval time, 20ms was set in the microcontroller.
(5) the resistance value of micro-controller instructions atomizer resistance value detection module detection atomizer；
In this step, as shown in figure 4, microcontroller connects test switch TEST_R signals, closure metal-oxide-semiconductor Q1And Q4, micro-control Device processed is according to reference resistance R15The AD magnitudes of voltage for detecting microcontroller R_DET ends at the same time flow through R to calculate15Current value, then Calculate the resistance of atomizer；Atomizer resistance value detection module detection resistance is realized by detecting electric current.
(6) after the resistance value for detecting atomizer, microcontroller judges whether the resistance value of atomizer exceedes dry combustion method protection setting resistance Value is such as 2.5 ohm, if it is not, then return to step is (3), if it is, into next step；
(7) the resistance value of atomizer in abovementioned steps is continued to exceed the number+1 of dry combustion method protection setting resistance value by microcontroller；
The number that this step continues to exceed measure resistance value setting resistance value adds up.
(8) whether the cumulative number that microcontroller judges to continue to exceed dry combustion method protection setting resistance value reaches setting number such as 5 It is secondary, if it is not, then return to step is (4), if it is, into next step；
In this step, only when the setting resistance value that the atomizer resistance value that continuous several times detect is protected more than dry combustion method, and And when reaching setting number, just show that atomizer lacks tobacco juice and dry combustion method occurs.
(9) microcontroller judges the state of electronic cigarette for dry-fire condition；
(10) the output of half-bridge booster circuit or chopping depressuring circuit is closed, and electronic cigarette is stopped.
The above is only the preferred embodiment of the present invention, it is all done according to the utility model claims scope it is equal Deng change and modify, should all belong to the covering scope of the utility model claims.

Claims (11)

1. a kind of anti-dry burning device of electronic cigarette, it is characterised in that including microcontroller, half-bridge booster circuit, chopping depressuring electricity Road, atomizer, atomizer resistance value detection module, battery feed circuit, the battery feed circuit include switch and it is chargeable Battery, the microcontroller are sequentially connected electrically the half-bridge booster circuit, chopping depressuring circuit, atomizer, the inspection of atomizer resistance value Survey module and then take back microcontroller, the first feedback circuit, institute are connected between the chopping depressuring circuit and the atomizer State and the second feedback circuit is connected between chopping depressuring circuit and the half-bridge booster circuit, first feedback circuit and second Feedback circuit is respectively connected to microcontroller, and microcontroller is electrically connected chopping depressuring circuit；Second feedback circuit feeds back half-bridge The output voltage signal of booster circuit, it is described so that microcontroller adjusts the output voltage of half-bridge booster circuit and keeps stable First feedback circuit feeds back the output voltage signal of chopping depressuring circuit, so as to the output of microcontroller adjustment chopping depressuring circuit Voltage simultaneously keeps stable；When electronic cigarette works, atomizer resistance value detection module connects according to the interval setting time of microcontroller The resistance value of continuous detection atomizer, when the number that the resistance value of atomizer continues to exceed dry combustion method protection setting resistance value and continues to exceed reaches During to setting number, micro-controller instructions half-bridge booster circuit or chopping depressuring circuit close output, and electronic cigarette is stopped.
2. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that the atomizer is also electrically connected electric current inspection Module is surveyed, the current detection module is respectively connected to short-circuit detecting module, the short circuit with the atomizer resistance value detection module Detection module accesses microcontroller.
3. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that further include charging circuit, charger, fill Electrical voltage detection module, the microcontroller are electrically connected charging circuit, and the charger is electrically connected charger voltage detection mould Block is followed by into microcontroller, and the charger is also sequentially connected electrically after charging circuit, battery feed circuit respectively to microcontroller Power with half-bridge booster circuit；The microcontroller is also respectively connected with LED control module, switch detection module and auxiliary boost mould Block, the auxiliary boost module access the half-bridge booster circuit.
4. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that be additionally provided with temperature sensor and battery temperature Detection module is spent, during charging, the temperature signal of the temperature sensor monitoring cell simultaneously accesses the battery temperature detection module, Microcontroller is accessed by the battery feed circuit again, when temperature signal exceedes design temperature value range, microcontroller refers to Charging circuit is made to stop charging；It is micro- when the temperature sensor detects that temperature signal exceedes design temperature value range during electric discharge Controller instructs half-bridge booster circuit or chopping depressuring circuit to close output, and electronic cigarette is stopped.
5. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that the half-bridge booster circuit includes master control Chip U3, inductance L1, capacitance C1With capacitance C2, main control chip U3Including the 4th pin VSW, the 4th pin VSW is through inductance L1Point Lian Jie not capacitance C2, capacitance C1One end and anode BAT+, the capacitance C2With capacitance C1The other end be grounded；It is described Half-bridge booster circuit further includes capacitance C3, capacitance C4, wherein, the chip U3Including the 5th pin VIN, the 5th pin VIN points Lian Jie not capacitance C3, capacitance C4One end and half-bridge output terminal VOUT, capacitance C3With capacitance C4The other end be grounded；The master Control chip U3Inside includes two N-MOS and manages, the main control chip U3Equipped with the 8th pin PWM to input the first setpoint frequency PWM-IN signals, PWM-IN signals control described two N-MOS pipes to reach boosting, pass through the 5th pin VIN output voltages to half-bridge Output terminal VOUT, while the frequency for the signal adjustment PWM-IN signals for passing through the second feedback circuit, make half-bridge output terminal VOUT's Voltage stabilization to setting voltage V1。
6. the anti-dry burning device of electronic cigarette according to claim 5, it is characterised in that the chopping depressuring circuit includes MOS Pipe Q2, resistance R18, triode Q3, resistance R20, pull down resistor R7, chopping depressuring output terminal PWM_OUT and the second setpoint frequency Output terminal OUT_PWM, the half-bridge output terminal VOUT are electrically connected metal-oxide-semiconductor Q2Source S, resistance R18, the resistance R18Connect Enter metal-oxide-semiconductor Q2Grid G and triode Q3Collector 3, metal-oxide-semiconductor Q2Drain D access chopping depressuring output terminal PWM_OUT, institute State triode Q3Emitter 2 be grounded, triode Q3Base stage 1 through resistance R20After be respectively connected to pull down resistor R7One end and The output terminal OUT_PWM of two setpoint frequencies；The output terminal OUT_PWM of second setpoint frequency accesses the microcontroller, under Pull-up resistor R7The other end ground connection.
7. the anti-dry burning device of electronic cigarette according to claim 6, it is characterised in that the atomizer resistance value detection module bag Include anode BAT+, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q4, resistance R12, resistance R14, test switch TEST_R, reference resistance R15, resistance R16, resistance R17, resistance R21With capacitance C17, microcontroller R_DET ends, the anode BAT+ connects metal-oxide-semiconductor Q respectively1Source Pole 2 and resistance R12, resistance R12The other end respectively with metal-oxide-semiconductor Q1Grid 1, metal-oxide-semiconductor Q4Grid 1 and resistance R14, the electricity Hinder R14Other end connecting test switchs TEST_R, metal-oxide-semiconductor Q1Drain electrode 3 and metal-oxide-semiconductor Q4Drain electrode 3 connect, metal-oxide-semiconductor Q4Source electrode 2 Connect reference resistance R15, resistance R16It is followed by into microcontroller R_DET ends, reference resistance R15With resistance R16Between node difference Connect chopping depressuring output terminal PWM_OUT and resistance R17, resistance R17The other end ground connection, resistance R16With microcontroller R_DET ends Between node connect resistance R respectively21, capacitance C17, resistance R21With capacitance C17The other end ground connection；When surveying dry combustion method, microcontroller Connect test switch TEST_R signals, closure metal-oxide-semiconductor Q1And Q4, microcontroller is according to reference resistance R15Detect microcontroller at the same time The AD magnitudes of voltage at R_DET ends flow through reference resistance R to calculate15Current value, then calculate the resistance of atomizer.
8. the anti-dry burning device of electronic cigarette according to claim 2, it is characterised in that the short-circuit detecting module includes resistance R19, resistance R22, capacitance C15, CON1 terminals, atomizer anode F-, short-circuit detecting point SHORT_DET, the short-circuit detecting point Series resistance R between SHORT_DET and the CON1 terminals19, the short-circuit detecting point SHORT_DET be also connected with capacitance C15, institute State capacitance C15Other end ground connection, the CON1 terminals are also respectively connected with F- and resistance R22, resistance R22The other end ground connection；Institute Short-circuit detecting module is stated by detecting short-circuit resistance R22On pressure drop, then pass through the microcontroller detect short-circuit detecting point The current value of SHORT_DET simultaneously judges whether to exceed short-circuit protection setting electric current value, as closed half by microcontroller more than if The output of bridge booster circuit or chopping depressuring circuit, electronic cigarette are stopped.
9. the anti-dry burning device of electronic cigarette according to claim 5, it is characterised in that first setpoint frequency for 100K~ 300KHz, the setting voltage V1For 3.0~5.5V.
10. the anti-dry burning device of electronic cigarette according to claim 6, it is characterised in that second setpoint frequency for 30~ 100Hz。
11. the anti-dry burning device of electronic cigarette according to claim 7, it is characterised in that dry combustion method protection set resistance value as 0.05~6.0 ohm, the number that sets is at least 1 time.
CN201721018731.4U 2017-08-15 2017-08-15 The anti-dry burning device of electronic cigarette Withdrawn - After Issue CN207236087U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107440157A (en) * 2017-08-15 2017-12-08 惠州市新泓威科技有限公司 The anti-dry burning device and its anti-dry control method of electronic cigarette
WO2019033887A1 (en) * 2017-08-15 2019-02-21 惠州市新泓威科技有限公司 Dry-burning prevention device of electronic cigarette and control method therefor
CN109875133A (en) * 2019-04-23 2019-06-14 深圳市吉迩科技有限公司 A kind of electronic smoke atomizer anti-dry control method and device thereof
CN111802709A (en) * 2020-07-14 2020-10-23 深圳麦克韦尔科技有限公司 Electronic atomization device, control method, control device and computer equipment
WO2022011536A1 (en) * 2020-07-14 2022-01-20 深圳麦克韦尔科技有限公司 Electronic atomization apparatus, electronic atomization apparatus control method, and computer device
WO2022142726A1 (en) * 2020-12-31 2022-07-07 常州市派腾电子技术服务有限公司 Intelligent early-warning system of electronic cigarette for preventing dry hit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107440157A (en) * 2017-08-15 2017-12-08 惠州市新泓威科技有限公司 The anti-dry burning device and its anti-dry control method of electronic cigarette
WO2019033887A1 (en) * 2017-08-15 2019-02-21 惠州市新泓威科技有限公司 Dry-burning prevention device of electronic cigarette and control method therefor
WO2019033886A1 (en) * 2017-08-15 2019-02-21 惠州市新泓威科技有限公司 Dry-burning prevention device of electronic cigarette, and dry-burning prevention control method therefor
CN107440157B (en) * 2017-08-15 2020-04-07 惠州市新泓威科技有限公司 Dry burning prevention device of electronic cigarette and dry burning prevention control method thereof
CN109875133A (en) * 2019-04-23 2019-06-14 深圳市吉迩科技有限公司 A kind of electronic smoke atomizer anti-dry control method and device thereof
CN109875133B (en) * 2019-04-23 2020-07-17 深圳市吉迩科技有限公司 Anti-dry burning control method and device for electronic cigarette atomizer
CN111802709A (en) * 2020-07-14 2020-10-23 深圳麦克韦尔科技有限公司 Electronic atomization device, control method, control device and computer equipment
WO2022011536A1 (en) * 2020-07-14 2022-01-20 深圳麦克韦尔科技有限公司 Electronic atomization apparatus, electronic atomization apparatus control method, and computer device
WO2022142726A1 (en) * 2020-12-31 2022-07-07 常州市派腾电子技术服务有限公司 Intelligent early-warning system of electronic cigarette for preventing dry hit

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