CN204742632U - Electronic cigarette - Google Patents
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- CN204742632U CN204742632U CN201520278295.9U CN201520278295U CN204742632U CN 204742632 U CN204742632 U CN 204742632U CN 201520278295 U CN201520278295 U CN 201520278295U CN 204742632 U CN204742632 U CN 204742632U
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Abstract
The utility model discloses an electronic cigarette, this electronic cigarette include atomizing portion, battery unit and cigarette holder, atomizing portion and cigarette holder intercommunication, atomizing portion includes the heating wire and is used for storing the tobacco tar appearance chamber of tobacco tar, the winding has the wick on the heating wire, the both ends of wick are placed and are held the intracavity in the tobacco tar, battery unit is used for providing the power for the heating wire, form smog for heating wire heating wick, conduct to the cigarette holder, resistance corresponding change along with the change of temperature of heating wire, this battery unit includes the battery, boost module, first sampling module and control module, resistance through first sampling module sampling heating wire, transmit to control module, through its inside predetermined computation rule, can correspond the real - time voltage value of first sampling module sampling for the real -time resistance value of heating wire, when this resistance value reaches the default, then control module will adjust the duty cycle of the PWM signal of output, reduce boost module's output then to the temperature that makes the heating wire reduces. (Pbpnum='1' /)
Description
Technical field
The utility model relates to a kind of electronic cigarette.
Background technology
Traditional electronic cigarette is made up of atomization portion, battery unit, cigarette holder, and battery unit provides power supply, heats the heating wire of atomization portion; Heating wire is wound with wick, and tobacco tar cavity volume is put at the two ends of wick, after tobacco tar cavity volume is filled with tobacco tar, tobacco tar is sucked heating wire place by wick, and heating wire temperature after heating raises, and the cigarette on wick is heated volatilization, form smog, suck smoker's mouth from mouthpiece portion.
Because the power of the battery unit of current electronic cigarette is more and more higher, when tobacco tar amount is less time, high-power battery unit makes low-resistance heating wire temperature too high, and tobacco tar will produce pernicious gas at too high a temperature, have carcinogenic possibility after causing user to suck.
Utility model content
Main purpose of the present utility model is to provide a kind of electronic cigarette, aims to provide a kind of electronic cigarette of heating wire temperature-controllable.
For achieving the above object, the utility model provides a kind of electronic cigarette, and this electronic cigarette comprises atomization portion, battery unit and cigarette holder, and described atomization portion is communicated with described cigarette holder; Described atomization portion comprises heating wire and the tobacco tar cavity volume for storing tobacco tar, described heating wire is wound with wick, the two ends of described wick are positioned in tobacco tar cavity volume, described battery unit is used for providing power supply for described heating wire, form smog for described electric-heating-wire-heating wick, conduct to cigarette holder; The resistance variation with temperature of described heating wire and respective change, described battery unit comprises battery, boost module, the first sampling module and control module, the output of described battery is connected with the input of described boost module, the output of described boost module is connected with the power end of described heating wire, the sampling end of described first sampling module is connected with the power end of described heating wire, the output of described first sampling module is connected with the first test side of described control module, and the PWM output of described control module is connected with the adjustable side of described boost module; Wherein, the output voltage of described battery exports described heating wire to after described boost module boosting process, described first sampling module sample described heating wire resistance and be passed to described control module, when the resistance of described heating wire reaches preset value, described control module correspondence regulates the output voltage of described boost module.
Preferably, described first sampling module comprises operational amplifier and the first resistance, one end of described first resistance is connected with the output of described boost module, the first input end of operational amplifier, the reference edge of operational amplifier, the other end of described first resistance is connected with the second input of the power end of described heating wire, operational amplifier, the earth terminal ground connection of described heating wire; The Enable Pin of described operational amplifier is connected with the first level output end of described control module, and the output of described operational amplifier is connected with the first test side of described control module.
Preferably, described boost module comprises the first boost chip, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor and the first inductance, the adjustable side of described first boost chip is connected with the PWM output of described control module, first output of described first boost chip and the grid of described first metal-oxide-semiconductor, the second output of described first boost chip is connected with the grid of described second metal-oxide-semiconductor; One end of described first inductance is connected with the positive pole of described battery, the other end of described first inductance is connected with the drain electrode of the source electrode of the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the drain electrode of described first metal-oxide-semiconductor is connected with the first input end of described operational amplifier, the source ground of described second metal-oxide-semiconductor.
Preferably, described battery unit also comprises the first switch module of the output break-make for controlling described boost module, described first switch module is connected between the output of described boost module and the power end of described heating wire, described first switch module comprises the 3rd metal-oxide-semiconductor, the described grid of the 3rd metal-oxide-semiconductor is connected with the second electrical level output of described control module, the drain electrode of described 3rd metal-oxide-semiconductor is connected with the output of described boost module, and the source electrode of described 3rd metal-oxide-semiconductor is connected with the first input end of described operational amplifier.
Preferably, described battery unit also comprises the power module for providing working power for described control module, the first boost chip, the input of described power module is connected with the positive pole of described battery, first output of described power module is connected with the power end of described first boost chip, and the second output of described power module is connected with the power end of described control module.
Preferably, described power module comprises the second boost chip, DC/DC unit, second inductance, first diode, second resistance and the 3rd resistance, the Enable Pin of described second boost chip is connected with the three level output of described control module, the power end of described second boost chip and the positive pole of described battery, one end of second inductance connects, the other end of described second inductance and the adjustable side of described second boost chip, the anode of the first diode connects, the negative electrode of described first diode and the power end of described first boost chip, the input of DC/DC unit, one end of second resistance connects, the other end of described second resistance and the feedback end of described second boost chip, one end of 3rd resistance connects, the other end ground connection of described 3rd resistance, the output of described DC/DC unit is connected with the power end of described control module.
Preferably, described boost module also comprises the second switch module starting for controlling boost module or close, described second switch module comprises the 5th metal-oxide-semiconductor, the grid of described 5th metal-oxide-semiconductor is connected with the 4th level output end of described control module, the described drain electrode of the 5th metal-oxide-semiconductor is connected with the first output of described power module, and the source electrode of described 5th metal-oxide-semiconductor is connected with the power end of described first boost chip.
Preferably, described battery unit also comprises the second sampling module of the real-time voltage for described heating wire of sampling, described second sampling module comprises the 4th resistance and the 5th resistance, one end of described 4th resistance is connected with the power end of described heating wire, the other end of described 4th resistance is connected with one end of the second test side of described control module, the 5th resistance, the other end ground connection of described 5th resistance.
Preferably, described battery unit also comprises the anti-reverse module for preventing battery reversal connection, described anti-reverse module comprises the 4th metal-oxide-semiconductor, the described grid of the 4th metal-oxide-semiconductor is connected with the first output of described power module, the drain electrode of described 4th metal-oxide-semiconductor is connected with the negative pole of described battery, the source ground of described 4th metal-oxide-semiconductor.
A kind of electronic cigarette provided by the utility model, by first sampling module sampling heating wire resistance corresponding to magnitude of voltage, be passed to control module, by the computation rule of control module internal preset, the real-time voltage value of the first sampling module sampling can be corresponded to the real time resistance value of heating wire.When the resistance value of heating wire reaches preset value, then control module is by the dutycycle of the pwm signal of regulation output, then reduces the output of boost module, reduces, till the resistance that heating wire is corresponding is down to below preset value to make the temperature of heating wire; Due to the environment temperature that the real-time resistance of heating wire is corresponding real-time, thus reached the object of the heating-up temperature controlling heating wire by the real-time resistance monitoring heating wire.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model first embodiment;
Fig. 2 is the sectional view of the utility model first embodiment.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of electronic cigarette.
With reference to the high-level schematic functional block diagram that Fig. 1, Fig. 1 are the battery unit of the utility model electronic cigarette, in the present embodiment, this electronic cigarette comprises atomization portion, battery unit and cigarette holder, and described atomization portion is communicated with described cigarette holder, described atomization portion comprises heating wire and the tobacco tar cavity volume for storing tobacco tar, described heating wire is wound with wick, the two ends of described wick are positioned in tobacco tar cavity volume, described battery unit is used for providing power supply for described heating wire, form smog for described electric-heating-wire-heating wick, conduct to cigarette holder, the resistance variation with temperature of described heating wire and respective change, described battery unit comprises battery 100, boost module 200, first sampling module 400 and control module 300, the output of described battery 100 is connected with the input of described boost module 200, the output of described boost module 200 is connected with the power end of described heating wire, the sampling end of described first sampling module 400 is connected with the power end of described heating wire, the output of described first sampling module 400 is connected with the first test side of described control module 300, the PWM output of described control module 300 is connected with the adjustable side of described boost module 200, wherein, the output voltage of described battery 100 exports described heating wire to after described boost module 200 boosts process, described first sampling module 400 is sampled magnitude of voltage corresponding to the resistance of described heating wire be passed to described control module 300, when the resistance of described heating wire reaches preset value, described control module 300 correspondence regulates the output voltage of described boost module 200.
In the present embodiment, heating wire preferably adopts Ni200 material to make, the rising of the electrical resistance temperature of this heating wire, and resistance increases.Electronic cigarette has multiple power pattern, such as 5W power mode, 20W power mode etc., in the present embodiment, the mode setting terminal of control module 300 is connected with an interrupteur SW 1, by pressing this interrupteur SW 1, can set the power mode of electronic cigarette, when after the power mode setting this electronic cigarette, then control module 300 will export the pwm signal of duty ratio corresponding to the adjustable side of boost module 200, then the dutycycle according to pwm signal is passed to heating wire by after the boosting of the output voltage of battery 100 correspondence by this boost module 200, for powering for heating wire, to make heating wire work.When the tobacco tar in tobacco tar cavity volume is less, now, when controlling the output of boost module 200 with the power of former setting, then the temperature of heating wire will sharply rise, and tobacco tar will produce pernicious gas at too high a temperature, cause damage to user.For this reason, by the first sampling module 400 sample heating wire resistance corresponding to magnitude of voltage, be passed to control module 300, by the computation rule of control module 300 internal preset, the real-time voltage value that the first sampling module 400 is sampled can be corresponded to the real time resistance value of heating wire.When the resistance value of heating wire reaches preset value, then control module 300 is by the dutycycle of the pwm signal of regulation output, then reduces the output of boost module 200, reduces, till the resistance that heating wire is corresponding is down to below preset value to make the temperature of heating wire.Due to the environment temperature that the real-time resistance of heating wire is corresponding real-time, thus reached the object of the heating-up temperature controlling heating wire by the real-time resistance monitoring heating wire.
Further, reference Fig. 2, Fig. 2 is the electrical block diagram of the battery unit of the utility model electronic cigarette; In the present embodiment, the control module 300 of this battery unit preferably adopts single-chip microcomputer to carry out regulable control.Particularly, first sampling module 400 comprises operational amplifier U5 and the first resistance R8, one end of described first resistance R8 is connected with the output of described boost module 200, the first input end IN-of operational amplifier U5, the reference edge REF of operational amplifier, the other end of described first resistance R8 is connected with the second input IN+ of the power end of described heating wire, operational amplifier U5, the earth terminal ground connection of described heating wire; The Enable Pin V+ of described operational amplifier U5 is connected with the first level output end AD of described control module 300, and the output of described operational amplifier U5 is connected with the first test side AD1 of described control module 300.
In the present embodiment, when electronic cigarette is when normally working, control first level output end AD is exported the Enable Pin V+ of high level signal to operational amplifier U5 by control module 300, thus operational amplifier U5 normally works, and the real-time potential value at the first resistance R8 two ends of being sampled by its first input end IN-and the second input IN+, in the present embodiment, by the reference edge REF of operational amplifier U5 is connected with the first input end IN-of operational amplifier U5, thus the potential value that the first input end IN-of operational amplifier U5 gathers is as a reference value, namely the potential value that the second input IN+ of operational amplifier U5 gathers is equivalent to the magnitude of voltage at the first resistance R8 two ends.The magnitude of voltage at the first resistance R8 two ends gathered is passed to the first test side AD1 of control module 300 by this operational amplifier U5 after amplifying, because the resistance of the first resistance R8 is determined known, the resistance application Ohm's law of the magnitude of voltage that this control module 300 detects according to the first test side AD1 and the first resistance R8 can calculate the current value on the first resistance R8; And between the output that heating wire is equivalent to and the first resistance R8 is connected on boost module 200 and ground, the current value namely on heating wire is equal with the current value on the first resistance R8.Because the voltage at heating wire two ends can obtain according to the second sampling module 600 sampling, the current value on heating wire can be obtained by the first sampling module 400, control module 300 can reduce the real-time resistance of heating wire according to internal calculation, thus regulate according to the output voltage of resistance to boost module 200 of heating wire, remain in safe range to make the temperature of heating wire.
Particularly, in the present embodiment, the resistance of this first resistance R8 is preferably 0.01 ohm; And the multiplication factor of operational amplifier U5 can be selected according to the actual requirements, in this no limit.
Particularly, described battery unit also comprises the second sampling module 600 of the real-time voltage for heating wire of sampling, described second sampling module 600 comprises the 4th resistance R12 and the 5th resistance R20, one end of described 4th resistance R12 is connected with the power end of described heating wire, the other end of described 4th resistance R12 is connected with one end of the second test side of described control module 300, the 5th resistance R20, the other end ground connection of described 5th resistance R20.
The voltage of the output of the bleeder circuit sampling boost module 200 that this second sampling module 600 consists of the 4th resistance R12 and the 5th resistance R20 is also passed to the second test side of control module 300, particularly, the dividing potential drop of the output voltage that second sampling module 600 detects boost module 200 on the 5th resistance R20 is also passed to control module 300, because the resistance of the 4th resistance R12, the 5th resistance R20 is definite value, after the partial pressure value on the 5th resistance R20 is detected, then can be drawn the voltage at heating wire two ends by voltage divider principle; The above analysis, control module 300 is according to the current value on the voltage at the heating wire two ends detected, heating wire, the real time resistance value of heating wire can be drawn, regulate the output voltage of boost module 200 to reach the heating-up temperature controlling heating wire according to real time resistance value.
Further, described boost module 200 comprises the first boost chip U10, the first metal-oxide-semiconductor U8, the second metal-oxide-semiconductor U6 and the first inductance L 1, the adjustable side of described first boost chip U10 is connected with the PWM output of described control module 300, first output of described first boost chip U10 and the grid of described first metal-oxide-semiconductor U8, second output of described first boost chip U10 is connected with the grid of described second metal-oxide-semiconductor U6; One end of described first inductance L 1 is connected with the positive pole of described battery 100, the other end of described first inductance L 1 is connected with the drain electrode of the source electrode of the first metal-oxide-semiconductor U8, the second metal-oxide-semiconductor U6, the drain electrode of described first metal-oxide-semiconductor U8 is connected with the first input end IN-of described operational amplifier U5, the source ground of described second metal-oxide-semiconductor U6.
This first boost chip U10 comprises adjustable side IN, power end VDD, Enable Pin EN, the first output HO, the second output LO, its power end VDD is connected to the first output of power module 800 through second switch module 210, the driving voltage of this first boost chip U10 is preferably 10.8V, therefore, the voltage of the first output of power module 800 need reach 10.8V and could drive this first boost chip U10; And the driving of this first boost chip U10 is also by the control of second switch module 210.The Enable Pin EN of the first boost chip U10 is connected with the second output of power module 800, and the cut-in voltage of Enable Pin EN is preferably 3.3V, and namely when the second output output of power module 800 need reach 3.3V voltage, the first boost chip U10 could work.The adjustable side IN of the first boost chip U10 is connected with the PWM output of control module 300, by pwm signal to the first boost chip U10 that control module 300 output duty cycle is adjustable, can regulate the high level time of the first output HO of the first boost chip U10 and the second output LO or low level time, then regulate charging interval and the discharge time of the first inductance L 1, reach the object of the output voltage regulating boost module 200.
Particularly, when the resistance value of the heating wire corresponding to the magnitude of voltage that the first sampling module 400 that control module 300 receives transmits reaches preset value, then control module 300 will by the pwm signal of PWM output output duty cycle reduction, thus the dutycycle of the pulse signal of the first output HO output of the first boost chip U10 also increases relatively, the dutycycle correspondence of the pulse signal of the second output LO output of the first boost chip U10 reduces; And what export due to the first output HO of the first boost chip U10 and the second output LO is the pulse signal of complementary duty cycle, namely the time of the high level of the first output HO output of the first boost chip U10 is equal with the low level time that the second output LO exports, then the charging interval of the first inductance L 1 reduces, the discharge time of the first inductance L 1 increases, and the output voltage of boost module 200 reduces then.
In the present embodiment, control the first inductance L 1 charge by the first metal-oxide-semiconductor U8, control the first inductance L 1 discharge by the second metal-oxide-semiconductor U6, the first metal-oxide-semiconductor U8 and the second metal-oxide-semiconductor U6 preferably adopts depletion type N-channel MOS pipe; Namely when the first boost chip U10 first output HO export high level time and the second output LO output low level time, first metal-oxide-semiconductor U8 conducting, second metal-oxide-semiconductor U6 closes, after the voltage superposition that the positive pole of the output of battery 100 is corresponding with the electricity of the storage in the first inductance L 1, export heating wire to by the first metal-oxide-semiconductor U8; When the first boost chip U10 the first output HO output low level and second output LO export high level time, first metal-oxide-semiconductor U8 closes, second metal-oxide-semiconductor U6 conducting, thus the positive pole of battery 100, the first inductance L 1, second metal-oxide-semiconductor U6 form loop with ground, now battery 100 charges to the first inductance L 1.Thus when the resistance value of the heating wire corresponding to the magnitude of voltage that the first sampling module 400 that control module 300 receives transmits reaches preset value, the dutycycle of the pwm signal exported by PWM output by control module 300 is turned down, thus reduce the ON time of the second metal-oxide-semiconductor U6, increase the ON time of the first metal-oxide-semiconductor U8, namely the charging interval of the first inductance L 1 is reduced, increase the discharge time of the first inductance L 1, thus reduce the output voltage of boost module 200, the temperature of heating wire is finally made to reduce, until resistance value corresponding to heating wire is reduced to below preset value.
Particularly, described boost module 200 also comprises the second switch module 210 starting for controlling boost module 200 or close, described second switch module 210 comprises the 5th metal-oxide-semiconductor Q3, the grid of described 5th metal-oxide-semiconductor Q3 is connected with the 4th level output end HL of described control module 300, the drain electrode of described 5th metal-oxide-semiconductor Q3 is connected with the first output of described power module 800, and the source electrode of described 5th metal-oxide-semiconductor Q3 is connected with the power end of described first boost chip U10.
When battery 100 is just connecing or other each several part circuit normally work, 4th level output end HL of control module 300 exports the grid of high level to metal-oxide-semiconductor Q5, now metal-oxide-semiconductor Q5 conducting, due to the source ground of metal-oxide-semiconductor Q5, then the level of the grid of the 5th metal-oxide-semiconductor Q3 is dragged down, 5th metal-oxide-semiconductor Q3 successive conductive, thus the first output of power module 800 is communicated with the power end of the first boost chip U10, thus boost module 200 normally works; When circuit occurs abnormal, control module 300 by control the 4th level output end HL output low level to the grid of metal-oxide-semiconductor Q5, now metal-oxide-semiconductor Q5 closes, the grid of the 5th metal-oxide-semiconductor Q3 is drawn high to high level through the first output of resistance R2 and power module 800,5th metal-oxide-semiconductor Q3 closes, thus the power end of the first output of power module 800 and the first boost chip U10 disconnects, boost module 200 will quit work, and then stop powering to heating wire.In the present embodiment, the 5th metal-oxide-semiconductor Q3 preferably adopts P channel MOS tube, and metal-oxide-semiconductor Q5 preferably adopts depletion type N-channel MOS pipe.
Simultaneously, also control the conducting of the first switch module 500 by control module 300 and close the break-make realizing the output controlling boost module 200, particularly, between the output that described first switch module 500 is connected to described boost module 200 and the power end of described heating wire, described first switch module 500 comprises the 3rd metal-oxide-semiconductor U7, the grid of described 3rd metal-oxide-semiconductor U7 is connected with the second electrical level output SW of described control module 300, the drain electrode of described 3rd metal-oxide-semiconductor U7 is connected with the output of described boost module 200, the source electrode of described 3rd metal-oxide-semiconductor U7 is connected with the first input end IN-of described operational amplifier U5.
When battery 100 is just connecing or other each several part circuit normally work, the second electrical level output SW of control module 300 exports the grid of high level to metal-oxide-semiconductor Q4, now metal-oxide-semiconductor Q4 conducting, due to the source ground of metal-oxide-semiconductor Q4, then the level of the grid of the 3rd metal-oxide-semiconductor U7 is dragged down, 3rd metal-oxide-semiconductor U7 successive conductive, thus the power end of the output of boost module 200 and heating wire is connected, thus heating wire normally works; When circuit occurs abnormal, control module 300 will control the grid of second electrical level output SW output low level to metal-oxide-semiconductor Q4, now metal-oxide-semiconductor Q4 closes, the grid of the 3rd metal-oxide-semiconductor U7 is connected with the output of boost module 200 through resistance R7, when the output output voltage of boost module 200, draw high to high level by the grid of the 3rd metal-oxide-semiconductor U7, the 3rd metal-oxide-semiconductor U7 closes, thus the power end of the output of boost module 200 and heating wire disconnects, heating wire will quit work.In the present embodiment, the 3rd metal-oxide-semiconductor U7 preferably adopts P channel MOS tube, and metal-oxide-semiconductor Q4 preferably adopts depletion type N-channel MOS pipe.
Further, described battery unit also comprises the power module 800 for providing working power for described control module 300, first boost chip U10, the input of described power module 800 is connected with the positive pole of described battery 100, first output of described power module 800 is connected with the power end of described first boost chip U10, and the second output of described power module 800 is connected with the power end of described control module 300.
Particularly, described power module 800 comprises the second boost chip U1, DC/DC unit U4, second inductance L 3, first diode D5, second resistance R21 and the 3rd resistance R22, the Enable Pin CE of described second boost chip U1 is connected with the three level output of described control module 300, the power end VDD of described second boost chip U1 and the positive pole of described battery 100, one end of second inductance L 3 connects, the other end of described second inductance L 3 and the adjustable side LX of described second boost chip U1, the anode of the first diode D5 connects, the negative electrode of described first diode D5 and the power end VDD of described first boost chip U10, the input VDD of DC/DC unit U4, one end of second resistance R21 connects, the other end of described second resistance R21 and the feedback end of described second boost chip U1, one end of 3rd resistance R22 connects, the other end ground connection of described 3rd resistance R22, the output LED of described DC/DC unit U4 is connected with the power end of described control module 300.
This second boost chip U1 comprises Enable Pin CE, power end VDD, adjustable side LX and feedback end FB, when the three level output of control module 300 exports high level, this the second boost chip U1 Enable Pin CE opens, second boost chip U1 normally works, control to regulate the carrying out of the charging current of the second inductance L 3 by the second boost chip U1, then make the voltage stabilization of the first output of this power module 800 at 10.8V, and the magnitude of voltage of the first output of sampling according to the bleeder circuit for being formed by the second resistance R21 and the 3rd resistance R22 regulated, be specially the feedback end FB magnitude of voltage of the 3rd resistance R22 dividing potential drop gained being passed to the second boost chip U1, when the magnitude of voltage that the feedback end FB of the second boost chip U1 samples is less than the preset voltage value of its inside, illustrate that the magnitude of voltage of the first output of power module 800 is lower than 10.8V, control and regulation end LX is increased output current by this second boost chip U1, increase to make the charging current of the second inductance L 3, make the second inductance L 3 both end voltage lifting, thus the voltage of the negative electrode of the first diode D5 is raised, namely the voltage rise of the first output of power module 800 is made, when the magnitude of voltage that the feedback end FB of the second boost chip U1 samples is greater than the preset voltage value of its inside, illustrate that the magnitude of voltage of the first output of power module 800 is higher than 10.8V, control and regulation end LX is reduced output current by this second boost chip U1, reduce to make the charging current of the second inductance L 3, second inductance L 3 both end voltage is reduced, thus the voltage of the negative electrode of the first diode D5 is reduced, namely make the voltage of the first output of power module 800 reduce, made by said process the voltage stabilization of the first output of power module 800 at 10.8V, normally work to make the first boost chip U10.
Simultaneously, second output of this power module 800 is connected to the power end of control module 300 and the Enable Pin EN of the first boost chip U10, the output of this DC/DC unit U4 is the second output of this power module 800, the operating voltage of the first boost chip U10 and control module 300 is 3.3V, thus after the voltage step-down of the first output of power module 800 is stabilized in 3.3V by DC/DC unit U4, be passed to the power end of control module 300 and the Enable Pin EN of the first boost chip U10, control module 300 and the second boost chip U1 are normally worked.
And, this electronic cigarette also comprises the display unit for showing various parameter, and the operating voltage of this display unit is also 3.3V usually, thus, the output voltage of the second output of above-mentioned power module 800 can be exported to the power end of display unit, with simultaneously for display unit is powered; In the present embodiment, the corresponding ports of display unit connects with the corresponding I/O port of control module 300, thus the various real-time parameters (power etc. of the real time resistance value of such as heating wire, the real-time voltage value at heating wire two ends and electronic cigarette) after calculating of control module 300 being sampled are passed to display unit display, conveniently check the duty of electronic cigarette for user.
Further, described battery unit also comprises the anti-reverse module 900 for preventing battery 100 reversal connection, described anti-reverse module 900 comprises the 4th metal-oxide-semiconductor U3, the grid of described 4th metal-oxide-semiconductor U3 is connected with the first output of described power module 800, the drain electrode of described 4th metal-oxide-semiconductor U3 is connected with the negative pole of described battery 100, the source ground of described 4th metal-oxide-semiconductor U3.
When battery 100 just connects, the first output of power module 800 exports 10.8V voltage, is high level, thus by the 4th metal-oxide-semiconductor U3 conducting, thus the negative pole of battery 100 is connected to the ground, thus form loop, battery 100 normally exports, and boost module 200 normally works; When battery 100 reversal connection; first output no-output of power module 800; for low level; thus the 4th metal-oxide-semiconductor U3 disconnects the connection between the negative pole of battery 100 and ground; then the output of battery 100 is equivalent to open circuit, and boost module 200 does not work, by above-mentioned anti-reverse module 900; good protection is played to control module 300 etc., punctures chip to prevent backward voltage.
In the present embodiment, the 4th metal-oxide-semiconductor U3 preferably adopts depletion type N-channel MOS pipe.
In addition, this control module 300 also comprises the 3rd sampling module 700 for detecting self operating temperature, 3rd sampling module 700 is a bleeder circuit be made up of thermistor PTC and the 8th resistance R31, this thermistor PTC preferably adopts semistor PTC, one end of 8th resistance R31 is connected with the 5th level output end PA1 of control module 300, the voltage that 5th level output end PA1 exports preset voltage value normally works for this bleeder circuit, the 4th test side that 8th resistance R31 and the common point between thermistor PTC are connected to control module 300 as the output of the 3rd sampling module 700 is connected, when control module 300 is along with the increase of working time, the temperature of himself also raises, and during temperature rising, the resistance of thermistor PTC also increases thereupon, on thermistor PTC, institute's dividing potential drop gained also increases thereupon, when the dividing potential drop gained of thermistor PTC exceeds a certain preset value, illustrate that the temperature of control module 300 also reaches the limiting value of himself, now control module 300 will quit work, then whole circuit does not all work, by the temperature of the 3rd sampling module 700 sampling control module 300 self, in case control module 300 is because of high temperature damage.
These are only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model description and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (9)
1. an electronic cigarette, comprises atomization portion, battery unit and cigarette holder, and described atomization portion is communicated with described cigarette holder; Described atomization portion comprises heating wire and the tobacco tar cavity volume for storing tobacco tar, described heating wire is wound with wick, the two ends of described wick are positioned in tobacco tar cavity volume, described battery unit is used for providing power supply for described heating wire, smog is formed for described electric-heating-wire-heating wick, conduct to cigarette holder, it is characterized in that
The resistance variation with temperature of described heating wire and respective change, described battery unit comprises battery, boost module, the first sampling module and control module, the output of described battery is connected with the input of described boost module, the output of described boost module is connected with the power end of described heating wire, the sampling end of described first sampling module is connected with the power end of described heating wire, the output of described first sampling module is connected with the first test side of described control module, and the PWM output of described control module is connected with the adjustable side of described boost module; Wherein,
The output voltage of described battery exports described heating wire to after described boost module boosting process, described first sampling module sample described heating wire resistance and be passed to described control module, when the resistance of described heating wire reaches preset value, described control module correspondence regulates the output voltage of described boost module.
2. electronic cigarette as claimed in claim 1, it is characterized in that, described first sampling module comprises operational amplifier and the first resistance, one end of described first resistance is connected with the output of described boost module, the first input end of operational amplifier, the reference edge of operational amplifier, the other end of described first resistance is connected with the second input of the power end of described heating wire, operational amplifier, the earth terminal ground connection of described heating wire; The Enable Pin of described operational amplifier is connected with the first level output end of described control module, and the output of described operational amplifier is connected with the first test side of described control module.
3. electronic cigarette as claimed in claim 2, it is characterized in that, described boost module comprises the first boost chip, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor and the first inductance, the adjustable side of described first boost chip is connected with the PWM output of described control module, first output of described first boost chip and the grid of described first metal-oxide-semiconductor, the second output of described first boost chip is connected with the grid of described second metal-oxide-semiconductor; One end of described first inductance is connected with the positive pole of described battery, the other end of described first inductance is connected with the drain electrode of the source electrode of the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the drain electrode of described first metal-oxide-semiconductor is connected with the first input end of described operational amplifier, the source ground of described second metal-oxide-semiconductor.
4. electronic cigarette as claimed in claim 3, it is characterized in that, described battery unit also comprises the first switch module of the output break-make for controlling described boost module, described first switch module is connected between the output of described boost module and the power end of described heating wire, described first switch module comprises the 3rd metal-oxide-semiconductor, the described grid of the 3rd metal-oxide-semiconductor is connected with the second electrical level output of described control module, the drain electrode of described 3rd metal-oxide-semiconductor is connected with the output of described boost module, the source electrode of described 3rd metal-oxide-semiconductor is connected with the first input end of described operational amplifier.
5. electronic cigarette as claimed in claim 3, it is characterized in that, described battery unit also comprises the power module for providing working power for described control module, the first boost chip, the input of described power module is connected with the positive pole of described battery, first output of described power module is connected with the power end of described first boost chip, and the second output of described power module is connected with the power end of described control module.
6. electronic cigarette as claimed in claim 5, it is characterized in that, described power module comprises the second boost chip, DC/DC unit, second inductance, first diode, second resistance and the 3rd resistance, the Enable Pin of described second boost chip is connected with the three level output of described control module, the power end of described second boost chip and the positive pole of described battery, one end of second inductance connects, the other end of described second inductance and the adjustable side of described second boost chip, the anode of the first diode connects, the negative electrode of described first diode and the power end of described first boost chip, the input of DC/DC unit, one end of second resistance connects, the other end of described second resistance and the feedback end of described second boost chip, one end of 3rd resistance connects, the other end ground connection of described 3rd resistance, the output of described DC/DC unit is connected with the power end of described control module.
7. electronic cigarette as claimed in claim 5, it is characterized in that, described boost module also comprises the second switch module starting for controlling boost module or close, described second switch module comprises the 5th metal-oxide-semiconductor, the grid of described 5th metal-oxide-semiconductor is connected with the 4th level output end of described control module, the described drain electrode of the 5th metal-oxide-semiconductor is connected with the first output of described power module, and the source electrode of described 5th metal-oxide-semiconductor is connected with the power end of described first boost chip.
8. electronic cigarette as claimed in claim 1, it is characterized in that, described battery unit also comprises the second sampling module of the real-time voltage for described heating wire of sampling, described second sampling module comprises the 4th resistance and the 5th resistance, one end of described 4th resistance is connected with the power end of described heating wire, the other end of described 4th resistance is connected with one end of the second test side of described control module, the 5th resistance, the other end ground connection of described 5th resistance.
9. electronic cigarette as claimed in claim 5, it is characterized in that, described battery unit also comprises the anti-reverse module for preventing battery reversal connection, described anti-reverse module comprises the 4th metal-oxide-semiconductor, the described grid of the 4th metal-oxide-semiconductor is connected with the first output of described power module, the drain electrode of described 4th metal-oxide-semiconductor is connected with the negative pole of described battery, the source ground of described 4th metal-oxide-semiconductor.
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| CN201520278295.9U CN204742632U (en) | 2015-04-30 | 2015-04-30 | Electronic cigarette |
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Address after: 518000 Shenzhen City, Guangdong, Shenzhen City, Guangming New District, Gongming Street Chang Zhen community Changxin science and Technology Industrial Park 30 4 Building Patentee after: Shenzhen Ai Wei PROSYS SOLUTIONS Co., Ltd Address before: 518000, 3 floor, Lutn clean energy technology building, No. 2, Lang Shan, Nanshan District Nanshan Science and Technology Park, Shenzhen, Guangdong Patentee before: SHENZHEN AIWEIPUSI TECHNOLOGY CO., LTD. |