CN204203671U - A kind of efficent electronic cigarette control chip - Google Patents
A kind of efficent electronic cigarette control chip Download PDFInfo
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- CN204203671U CN204203671U CN201420732645.XU CN201420732645U CN204203671U CN 204203671 U CN204203671 U CN 204203671U CN 201420732645 U CN201420732645 U CN 201420732645U CN 204203671 U CN204203671 U CN 204203671U
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Abstract
The utility model discloses a kind of efficent electronic cigarette control chip, it is characterized in that, described control chip comprises system state judge module, Switch control circuit module and LED control circuit module, described system state judge module is connected with LED control circuit module with Switch control circuit module respectively, described Switch control circuit module comprises battery voltage sensing module, smoking period detection module and pwm control circuit, and described battery voltage sensing module is all connected with pwm control circuit with the output of smoking period detection module.The utility model improves the utilization rate of battery in electronic cigarette.
Description
Technical field
The utility model relates to a kind of efficent electronic cigarette control chip.
Background technology
When pneumatic sensor detects that user has a smoking action, the conducting of internal controller gauge tap pipe, but pure above-mentioned control has a fatal defects, when switching tube conducting, the voltage loading heating wire two ends is supply voltage, and the resistance of heating wire is fixing, this just explanation, when lower with cell voltage when cell voltage is higher, power on heating wire during each smoking cycle is also inconsistent, this just makes, in the higher situation of cell voltage, during smoking, the atomization speed of tobacco tar is too fast, causing may when cell voltage be higher, the electric quantity consumption of battery is too fast, and cell voltage lower when tobacco tar atomization speed slower, user feels that smoking effect is not good.
For this reason, market occurs some electronic cigarette controllers adopt the adjustable output waveform of output one pulsewidth to alleviate this problem to the average voltage controlled in each smoking cycle on heater strip, this mode can alleviate the difference that cell voltage changes the smoking effect caused, and also adds the serviceable life of battery to a certain extent.But prior art is when the time lengthening of each smoking cycle, and due to the rising along with heater strip temperature, required heating power reduces gradually, above-mentioned type of drive still can cause many powers of battery to be output as idle work.
Based on above problem, present invention is directed at the PWM control mode of switching power tube, propose a kind of controller inside and embedded in a battery voltage detection mechanism, by detecting the voltage of battery in real time, dynamic control Con holds the dutycycle of PWM waveform, namely, when cell voltage is higher, the Gate of the control signal driving switch pipe adopting duty smaller, and when cell voltage declines, real-time increase dutycycle, can be similar to like this and ensure in whole battery voltage range, the average voltage loading heating wire two ends keeps relative constancy, both ensure that user's smoking experience, be unlikely to again the consumption of battery electric quantity when the atomization speed of tobacco tar in the higher situation of cell voltage is too fast causes cell voltage height too fast, effectively battery power consumption is evenly distributed in whole battery voltage range, so also extend the serviceable life of battery to a certain extent, also the utilization factor of battery is namely added.
But above way is also not enough to battery electric quantity to utilize more efficiently, in each smoking cycle, heating wire is all elevated to the process of the ideal temperature that tobacco tar is atomized through one by lower temperature, in this process, the a part of temperature for heating wire of output power of battery raises, and a part is in order to offset the temperature dissipation of whole system; But the ideal temperature of atomization is reached once heating wire, battery only needs the power providing bucking-out system to dissipate, in order to ensure that namely heating wire temperature remained constant can meet smoking effect, and current product is in whole smoking process, the output power of battery all keeps constant, that is, in whole smoking process, there is the consumption of quite a few power, to the lifting of smoking effect without any help.
The electronic cigarette of present stage all adopts structure shown in Fig. 1 (a), comprise pneumatic sensor, control chip, internal battery, tobacco tar and heater strip assembly and pilot lamp five part composition, concrete annexation is as shown in Fig. 1 (b), and pneumatic sensor is held with sampling end SENS and VSS of control chip and is connected; Internal battery anode is connected with the vdd terminal of control chip, and negative terminal is held with the VSS of control chip and is connected; Tobacco tar and heater strip assembly are held with output terminal OUT and VSS of control chip and are connected; Pilot lamp respectively at control chip LED end and VSS end be connected.Each module major function is as follows: wherein the smoking action of external user is mainly converted into the change of the electrology characteristic that control chip can identify by pneumatic sensor, facilitates control chip to sample; Control chip is mainly through the output signal of sampling air flow sensor, judgement system present stage is in standby or smoking state, and according to different condition adjudgement results, corresponding action made by control heater strip and pilot lamp, meets the vision of user in smoking process and the organoleptic requirements of the sense of taste; Internal battery is the source of the energy of the inner all parts of electronic cigarette; also be the critical piece determining electronic cigarette serviceable life; tobacco tar and heater strip assembly mainly ensure in smoking process, can ensure that tobacco tar is atomized, meet the smoking experience of user when heating wire temperature rises; Pilot lamp is mainly used to the display effect of the flame in simulated smoking process, makes every effort to reach effect true to nature.
Control chip internal frame diagram comprises smoking detection module as shown in Figure 2, control module, Switch driving circuit, LED drive circuit and on-off circuit.Wherein, smoking detection module is connected with control module, and control module is connected with LED drive circuit respectively at Switch driving circuit, and Switch driving circuit is connected with switching device.Smoking detection module for detecting the output of pneumatic sensor, and judges which kind of state is system be in; Control module exports suitable control signal according to the state of system respectively to LED drive circuit and Switch driving circuit; LED drive circuit is used for the drive singal control signal of LED being converted into pilot lamp; Switch driving circuit is in order to be converted into actual switching drive signal by Switch control signal.
Traditional electronic cigarette control chip is by detecting the output of pneumatic sensor, state residing for judgement system (smoking or standby), and then the conducting of gauge tap pipe controls whether have electric current in heating wire with cut-off, as Fig. 3, wherein the control termination Con of switching device, is connected with the driver module of heating wire, positive termination anode V+, negative terminal economize on electricity heated filament, negative terminal and the battery negative terminal V-of heating wire and switching device are connected.
Under traditional controlling mechanism, the power of the heating wire in each smoking cycle is Vdd
2/ R, wherein, Vdd is cell voltage (here because switch conduction resistance is less, We conducted and ignore), and R is the average resistance of heating wire.This output power and supply voltage in close relations.
Fig. 4 represents the relation of heater strip power when heater strip resistance is 3 Ohm and supply voltage, as we can see from the figure, in whole battery voltage range, be generally the change of 3.3 ~ 4.2V output power have 60%, so use the initial stage at product, the consumption of the power of battery is larger, and this Partial Power too much consumed does not have any obvious help to smoking effect, also accelerate tobacco tar loss on the contrary.
Summary of the invention
For solving above-mentioned existing shortcoming, fundamental purpose of the present utility model is the efficent electronic cigarette control chip providing a kind of practicality, improves the utilization rate of battery in electronic cigarette.
For reaching above-described object, a kind of efficent electronic cigarette control chip of the present utility model takes following technical scheme:
A kind of efficent electronic cigarette control chip, it is characterized in that, described control chip comprises system state judge module, Switch control circuit module and LED control circuit module, described system shape body judge module is connected with LED control circuit module with Switch control circuit module respectively, described Switch control circuit module comprises battery voltage sensing module, smoking period detection module and pwm control circuit, and described battery voltage sensing module is all connected with pwm control circuit with the output of smoking period detection module.
Adopt the utility model of as above technical scheme, there is following beneficial effect:
Effectively extend the serviceable life of battery, especially when the time of each smoking of user is longer, effect is more obvious.
Accompanying drawing explanation
Fig. 1 (a) is the structural representation of existing electronic cigarette.
Fig. 1 (b) is the circuit connection diagram of existing electronic cigarette.
Fig. 2 is the internal frame diagram of existing electronic cigarette control chip.
Fig. 3 is that existing electronic cigarette control chip is by detecting the output of pneumatic sensor, the view residing for judgement system.
The heater strip power that Fig. 4 is existing heater strip resistance when being 3 Ohm and the relation schematic diagram of supply voltage.
Fig. 5 is the internal frame diagram that control module is optimized by the utility model.
Fig. 6 is heater strip temperature curve schematic diagram of the present utility model.
Fig. 7 is existing heater strip temperature curve schematic diagram.
Fig. 8 is the internal frame diagram that control module is optimized by the utility model further.
Fig. 9 is the duty corresponding relation figure of smoking period of the present utility model and PWM waveform.
Embodiment
In order to further illustrate the utility model, be described further below in conjunction with accompanying drawing:
As shown in Figure 5, a kind of efficent electronic cigarette control chip of the present utility model, proposes and adopts the adjustable mode switch tube of dutycycle to control, control module be optimized.By increasing battery voltage sensing module and PWM control module in control module inside, wherein system state judge module is connected with LED control module respectively at Switch control module, battery voltage sensing module is connected with PWM control module, detect the voltage of battery, and according to the change of the cell voltage dutycycle by adjustment PWM waveform, average voltage in each smoking cycle is stabilized in one be specifically worth, substantially remains unchanged at the power of whole battery voltage range internal consumption on heating wire like this.
But above-mentioned simple dependence detects the mode that supply voltage adjusts PWM dutycycle, and along with the increase of each smoking cycle time, it is just more and more obvious that problem exposes:
First, at the smoking initial stage, the power that battery outputs to heater strip has needed two parts function:
1. improve the temperature P1 of heating wire.
2. ensure the temperature P2 of cigarette oil atomization and heating wire.
Fig. 6 of the present invention is desirable heater strip temperature curve, when heating wire reaches the atomization temperature of tobacco tar, ideally suitably reduces output power, only ensures that output power is in order to maintain the temperature of heating wire.But existing PWM mode, because the output power in each smoking cycle is all identical, so temperature curve such as Fig. 7 of heating wire shows in each smoking cycle.
Because in each smoking cycle, the output power of battery is consistent, when heating wire temperature reaches the atomization temperature of tobacco tar, and now the output power of battery is still: (wherein Pbattery is cell output to Pbattery=P1+P2, P1 is for raising the excess power needed for heating wire temperature, P2 is for maintaining the power needed for heating wire atomizing cigarette oil temperature), and now battery only needs to provide P2 to heating wire, ensure that heating wire remains the temperature needed for atomization, and extra P1 is concerning the smoking experience of user, not any help.
Based on above consideration, we need to be optimized existing PWM mode, by by PWM control mode before by only affecting by cell voltage, be adjusted in each smoking cycle, the dutycycle of PWM is also relevant with the duration of smoking cycle except being correlated with cell voltage.
As shown in Figure 8, system state judge module is connected with Switch control module and LED control module respectively; The battery voltage sensing module of Switch control module inside and smoking period detection module output be all connected with pwm control circuit, the PWM waveform of common decision Switch control circuit, like this, original control module has been carried out further optimization by us: adopt the PWM mode controlled based on cell voltage in the initial set time of each smoking cycle, switch tube controls, when smoking cycle exceedes Preset Time, PWM dutycycle reduces according to a certain percentage by we on original basis.
As shown in Figure 9, when smoking period is less than t0, PWM control mode exports according to original dutycycle D0, ensure that the average voltage exported does not change with cell voltage, but when being greater than t0 when smoked, the dutycycle of inner PWM waveform reality exported according to a certain percentage of controller is enterprising Row sum-equal matrix D1 on original basis, although the temperature time curve that can not make heating wire so completely and ideal curve matching, but relative to initial PWM control mode more effective serviceable life extending battery, especially when the time of each smoking of user is longer, effect is more obvious.
Wherein t0, D0, D1 are determined by following relation:
D0=Vout0/Vdd, the constant voltage design load that wherein in Vout0 smoking early stage and t<t0 time, electronic cigarette exports;
D1=Vout1/Vdd, wherein Vout1 is the smoking later stage, i.e. the constant voltage design load of t>t0 electronic cigarette chip output;
T0 be electronic cigarette by be heated to the time that tobacco tar is atomized, determined by following formula: Vout0
2/ R*t0=K0*T, wherein K0 is a constant, and the temperature of T needed for electronic cigarette oil atomization, R is the conducting resistance of heater strip.
Wherein t0 is relevant to the resistance of heater strip, when adopting comparatively general 2 ~ 4 Ohm (representative value is 3 Ohm) heater strip, test duration is about 0.5s, D0, D1 is relevant with heater strip resistance to cell voltage, when adopting typical 3 Ohm heater strip, D0 carries out adjustment according to cell voltage and meets output voltage Vout0=3.5 ~ 3.7V (representative value is 3.6V), and D1 carries out adjustment according to cell voltage meets output voltage Vout1=2.9 ~ 3.1V (representative value is 3.0V).
The utility model adopts and controls the mode switch tube that dutycycle regulates in each smoking cycle, the electric-heating-wire-heating stage at electronic cigarette smoking initial stage, (this dutycycle is relevant with cell voltage to the resistance of heating wire to adopt the PWM mode switch tube of high duty ratio D0 to carry out driving, meet the power requirement that heating wire is warming up to tobacco tar atomization temperature and heating wire energy dissipation), when reaching the atomization temperature of heating wire (t0), dutycycle is reduced to the horizontal D1 that only can maintain system temperature, further save the power consumption in each cycle like this, improve the utilization factor of battery electric quantity further (wherein, t0, D0, D1 is relevant to cell voltage and heater strip resistance.
Claims (1)
1. an efficent electronic cigarette control chip, it is characterized in that, described control chip comprises system state judge module, Switch control circuit module and LED control circuit module, described system state judge module is connected with LED control circuit module with Switch control circuit module respectively, described Switch control circuit module comprises battery voltage sensing module, smoking period detection module and pwm control circuit, and described battery voltage sensing module is all connected with pwm control circuit with the output of smoking period detection module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420732645.XU CN204203671U (en) | 2014-11-28 | 2014-11-28 | A kind of efficent electronic cigarette control chip |
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| CN201420732645.XU CN204203671U (en) | 2014-11-28 | 2014-11-28 | A kind of efficent electronic cigarette control chip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460377A (en) * | 2014-11-28 | 2015-03-25 | 西安拓尔微电子有限责任公司 | Efficient electronic cigarette control chip |
| WO2016176800A1 (en) * | 2015-05-04 | 2016-11-10 | Fontem Holdings 2 B.V. | Liquid guiding structure, coil-less heating element and power management unit for electronic cigarettes |
| CN106712170A (en) * | 2016-12-16 | 2017-05-24 | 西安拓尔微电子有限责任公司 | Constant power output electronic cigarette and use method thereof |
-
2014
- 2014-11-28 CN CN201420732645.XU patent/CN204203671U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460377A (en) * | 2014-11-28 | 2015-03-25 | 西安拓尔微电子有限责任公司 | Efficient electronic cigarette control chip |
| WO2016176800A1 (en) * | 2015-05-04 | 2016-11-10 | Fontem Holdings 2 B.V. | Liquid guiding structure, coil-less heating element and power management unit for electronic cigarettes |
| US10588350B2 (en) | 2015-05-04 | 2020-03-17 | Fontem Holdings 1 B.V. | Liquid guiding structure, coil-less heating element and power management unit for electronic cigarettes |
| US11395514B2 (en) | 2015-05-04 | 2022-07-26 | Fontem Holdings 1 B.V. | Heating element for electronic vaporization devices |
| CN106712170A (en) * | 2016-12-16 | 2017-05-24 | 西安拓尔微电子有限责任公司 | Constant power output electronic cigarette and use method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: B201, zero one square, Xi'an Software Park, 72 Keji 2nd Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Patentee after: Tuoer Microelectronics Co.,Ltd. Address before: 710075 406 / 408, taibaige, Xi'an Software Park, No. 72, Keji Second Road, high tech Zone, Xi'an, Shaanxi Province Patentee before: XI'AN TUOER MICROELECTRONICS Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230412 Address after: Building 3, No.2528 Youyi Road, Guali Town, Xiaoshan District, Hangzhou City, Zhejiang Province, 311241 Patentee after: Hangzhou Shanger Semiconductor Co.,Ltd. Address before: B201, zero one square, Xi'an Software Park, 72 Keji 2nd Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Patentee before: Tuoer Microelectronics Co.,Ltd. |
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| TR01 | Transfer of patent right |