CN110250580A - A kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply - Google Patents
A kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply Download PDFInfo
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- CN110250580A CN110250580A CN201910557640.5A CN201910557640A CN110250580A CN 110250580 A CN110250580 A CN 110250580A CN 201910557640 A CN201910557640 A CN 201910557640A CN 110250580 A CN110250580 A CN 110250580A
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- resistance
- power supply
- heating wire
- operational amplifier
- switching tube
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- A24F47/008—
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- Control Of Temperature (AREA)
- Measuring Volume Flow (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The present invention provides a kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply, operational amplifier uses single supply integrator connection in temperature sampling circuit, single-chip microcontroller receives and generates PWM adjustment signal according to sampled signal to control the on-off of Q1, the resistance of heating wire R1 when changing balance, to play the role of changing temperature when heating wire is stablized.The present invention antiparallel diode D1 on heating wire can weaken concussion and due to voltage spikes caused by parasitic inductance.Use two-way external power supply simultaneously, power supply is that electric bridge is powered all the way, and another way power supply is that heater strip and switching tube series circuit are powered, switching tube Q1 and R2 not altogether, such electric bridge will steady operation always, thus the device put of operation export it is always linear.
Description
Technical field
The present invention relates to electronic cigarette technical field more particularly to a kind of electronic cigarettes based on dual power supply.
Background technique
Currently, in order to promote the Experience Degree of electronic cigarette, the function of temperature control of electronic cigarette has been most electronic cigarette hosts
Standard configuration.In electronic cigarette, heating wire is responsible for heating, evaporation tobacco tar and is also resistance wire, the electricity of heating wire to generate fog
Resistance can change with the variation of temperature, and the temperature control technology of electronic cigarette is exactly this characteristic of foundation heating wire to realize temperature at present
Control function.
Fig. 1 is at present using a kind of more constant-temp. electronic cigarette temperature sampling circuit.Its working principle is: temperature sampling
Operational amplifier uses single supply integrator connection in circuit, and heating wire R1 and resistance R2, R3, R4 are connected into the form of electric bridge, electricity
Bridge both sides midpoint is as integrator Differential Input.When switching tube Q1 is turned off, bridge-operative, the sampled signal of operational amplifier output
The signal receiving end of single-chip microcontroller is connected, single-chip microcontroller receives and generates PWM adjustment signal according to sampled signal to control the logical of Q1
It is disconnected.When switching tube Q1 is connected ,+5V power supply is applied directly to be heated on heating wire, electric bridge disequilibrium, at this time operational amplifier
Do not export.Therefore, the output of operational amplifier is nonlinear in the circuit.Three pins of single-chip microcontroller by R6, R7,
One of bridge arm of R8 tri- different size of resistance access electric bridges, come the resistance of heating wire when changing balance, to play
Change the effect of temperature when heating wire is stablized.
The shortcomings that this circuit is since there are parasitic inductances in switching tube and heating wire, so that there are voltages for sampled signal
Spike and concussion.Operational amplifier does not export when due to switch conduction.Leading to the output of operational amplifier in the circuit is
It is nonlinear.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply, energy
Enough decreases even are eliminated sampled signal caused by the parasitic inductance present in switching tube and heating wire, and there are due to voltage spikes
With concussion problem, and make the linearization of operational amplifier.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply, including temperature collection circuit, control circuit and power interface；
It include heating wire R1 and resistance R2, R3, R4 in the temperature collection circuit, heating wire R1 and resistance R2, R3, R4 connect
At electric bridge, heating wire R1 and resistance R2 series connection are an electric bridge, and resistance R3 and resistance R4 series connection are another electric bridge, two electric bridges
Two Differential Inputs of the midpoint as integrator, operational amplifier uses single supply integrator connection, and+5V power supply is resistance R3
It powers with the series circuit and operational amplifier of resistance R4, the other end of a termination+5V of resistance R3, resistance R3 connect R4, electricity
Hinder the other end ground connection of R4；The positive BAT+ of external connection battery power supply is the concatenated branch power supply of heating wire R1 and switching tube Q1,
Termination a BAT+, another terminating resistor R2 of heating wire R1 of heating wire R1, the drain of switching tube Q1 and operational amplifier it is same
Another termination GND of Xiang Duan, resistance R2, the source level of switching tube Q1 meet external power supply cathode BAT-, and wherein BAT- voltage is zero；Two
Pole pipe D1 and heating wire R1 inverse parallel, the i.e. cathode of diode D1 are connected with the positive BAT+ of external connection battery power supply, diode D1
Anode be connected to the other end of heating wire R1 and the drain electrode of switching tube Q1, weaken concussion caused by parasitic inductance and voltage point
Peak；Between end a Jie resistance R3 and resistance R4 of resistance R5, another termination operational amplifier reverse side and capacitor of resistance R5
The output terminals A DC of one end of C1, the output terminals A DC of another termination operational amplifier of capacitor C1, operational amplifier accesses monolithic
Machine；Between end a Jie resistance R3 and resistance R4 of resistance R6, R7, R8, the other end of resistance R6, R7, R8 are separately connected pin
RA0、RA1、RA2。
The control circuit is single-chip microcontroller, and three pins P00, P01, P02 of single-chip microcontroller connect temperature collection circuit respectively
RA0,RA1,RA2；The output pin P11 of single-chip microcontroller meets the output terminals A DC in operational amplifier, receives the defeated of operational amplifier
Sampled signal out；The pwm signal output pin P05 of single-chip microcontroller connects the grid in switching tube Q1.
In the temperature collection circuit, no matter switching tube Q1, which is opened, is also off, the work of electric bridge all-the-time stable, operation amplifier
The input terminal of device has a stable sampled signal input always, thus the output of device that operation is put is always linear；Switching tube Q1 is opened
When logical ,+5V power supply is applied directly to heating wire R1 and is heated；When switching tube Q1 is turned off, since R2 resistance value is larger, heating wire is no longer
Heating, single-chip microcontroller generates adjustment pwm signal according to the sampled signal received, thus the on-off of control switch pipe Q1；Single-chip microcontroller
Three pins one of bridge arm of electric bridge is accessed by resistance R6, R7, R8 tri- different size of resistance, when changing balance
The resistance of heating wire R1, to play the role of changing temperature when heating wire is stablized.
The E85F3325 of 20 pin of single-chip microcontroller model of the control circuit.
The power interface is respectively temperature collection circuit and single-chip microcontroller power supply, and external connection battery is electric in temperature collection circuit
The BAT+ in source is+5V.
In the temperature collection circuit, the resistance value of resistance R2 is 100-150 times of heating wire R1 resistance value when reaching balance,
The resistance value of resistance R4 is 100-150 times of resistance R3 resistance value.
The beneficial effects of the present invention are diode D1 antiparallel on heating wire, can weaken caused by parasitic inductance
Concussion and due to voltage spikes.Two-way external power supply is used simultaneously, and power supply is electric bridge power supply all the way, and another way power supply is heater strip and opens
Close the power supply of pipe series circuit, switching tube Q1 and R2 not altogether, such electric bridge will steady operation always, thus the operation device put
It exports always linear.
Detailed description of the invention
Fig. 1 is existing using a kind of more constant-temp. electronic cigarette temperature sampling circuit figure.
Fig. 2 is overall schematic of the present invention.
Fig. 3 is temperature acquisition circuit diagram of the invention.
Fig. 4 is electric operation control circuit figure of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
A kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply, including temperature collection circuit, control circuit and power interface.
It include heating wire R1 and resistance R2, R3, R4 in the temperature collection circuit, heating wire R1 and resistance R2, R3, R4 connect
At electric bridge, heating wire R1 and resistance R2 series connection are an electric bridge, and resistance R3 and resistance R4 series connection are another electric bridge, two electric bridges
Two Differential Inputs of the midpoint as integrator, operational amplifier uses single supply integrator connection, and+5V power supply is resistance R3
It powers with the series circuit and operational amplifier of resistance R4, the other end of a termination+5V of resistance R3, resistance R3 connect R4, electricity
Hinder the other end ground connection of R4；The positive BAT+ of external connection battery power supply is the concatenated branch power supply of heating wire R1 and switching tube Q1,
Termination a BAT+, another terminating resistor R2 of heating wire R1 of heating wire R1, the drain of switching tube Q1 and operational amplifier it is same
Another termination GND of Xiang Duan, resistance R2, the source level of switching tube Q1 meet external power supply cathode BAT-, and wherein BAT- voltage is zero；Two
Pole pipe D1 and heating wire R1 inverse parallel, the i.e. cathode of diode D1 are connected with the positive BAT+ of external connection battery power supply, diode D1
Anode be connected to the other end of heating wire R1 and the drain electrode of switching tube Q1, weaken concussion caused by parasitic inductance and voltage point
Peak；Between end a Jie resistance R3 and resistance R4 of resistance R5, another termination operational amplifier reverse side and capacitor of resistance R5
The output terminals A DC of one end of C1, the output terminals A DC of another termination operational amplifier of capacitor C1, operational amplifier accesses monolithic
Machine；Between end a Jie resistance R3 and resistance R4 of resistance R6, R7, R8, the other end of resistance R6, R7, R8 are separately connected pin
RA0、RA1、RA2。
The E85F3325 of 20 pin of single-chip microcontroller model of the control circuit.It is according to temperature collection circuit it is found that used
To pin have 5.Three pins P00, P01, P02 of control circuit connect RA0, RA1, RA2 of temperature collection circuit respectively；It is single
The output pin P11 of piece machine meets the output terminals A DC in operational amplifier, receives the output sampled signal of operational amplifier；It is single
The pwm signal output pin P05 of piece machine connects the grid in switching tube Q1.
The power interface is respectively temperature collection circuit and single-chip microcontroller power supply, and external connection battery is electric in temperature collection circuit
The BAT+ in source is+5V.
In the temperature collection circuit, the resistance value of resistance R2 is 100-150 times of heating wire R1 resistance value when reaching balance,
The resistance value of resistance R4 is 100-150 times of resistance R3 resistance value；
In the temperature collection circuit, no matter switching tube Q1, which is opened, is also off, the work of electric bridge all-the-time stable, that is, is transported
The input terminal for calculating amplifier has a stable sampled signal input always, thus the output of device that operation is put is always linear；Switch
When pipe Q1 is opened ,+5V power supply is applied directly to heating wire R1 and is heated；When switching tube Q1 is turned off, since R2 resistance value is larger, electric heating
Silk is no longer heat up.Single-chip microcontroller generates adjustment pwm signal in real time according to the sampled signal received, so that control switch pipe Q1's is logical
It is disconnected.Three pins of single-chip microcontroller access one of bridge arm of electric bridge by resistance R6, R7, R8 tri- different size of resistance,
The resistance of heating wire R1 when changing balance, to play the role of changing temperature when heating wire is stablized.
As shown in Fig. 2, a kind of High Accuracy Constant Temperature electronic cigarette overall schematic based on dual power supply.The present invention is mainly by temperature
Acquisition Circuit, single chip machine controlling circuit and power interface composition.Information exchange is carried out between temperature collection circuit and single-chip microcontroller, is wrapped
RA0, RA1, RA2 that single-chip microcontroller is exported to temperature collection circuit are included, pwm signal, there are also temperature collection circuits to export to single-chip microcontroller
Operational amplifier export sampled signal ADC.Power supply only stays hardware interface to access two external power supplies.
As shown in figure 3, a kind of temperature acquisition circuit diagram of the High Accuracy Constant Temperature electronic cigarette based on dual power supply.The temperature is adopted
Heating wire R1 and R2, R3, R4 are connected into the form of electric bridge in sample circuit, and electric bridge both sides midpoint is as integrator Differential Input, operation
Amplifier uses single supply integrator connection.+ 5V power supply is that R3, R4 series circuit and operational amplifier are powered, the termination of R3 mono-+
5V, the other end connect R4, R4 other end ground connection.BAT+ is R1 and switching tube series arm is powered, and R1 mono- terminates BAT+, the other end
R2, Q1 and operational amplifier in-phase end, another termination GND of R2, another termination BAT- of S1.D1 is the anti-paralleled diode of R1.
Between end Jie R3, the R4 of R5, another termination operational amplifier of another termination operational amplifier reverse side and capacitor C1, C1
Output end, the output terminals A DC of operational amplifier accesses single-chip microcontroller.Between end Jie R3, the R4 of R6, R7, R8, the other end point
Pin RA0, RA1, RA2 in single-chip microcontroller are not met.
As shown in figure 4, the E85F3325 of 20 pin of single-chip microcontroller model of the control circuit.According to temperature sampling circuit
It is found that used single-chip microcontroller pin has 5.P00, P01, P02 pin are separately connected RA0, RA1, RA2.P11 pin, which connects, to be transported
The output terminals A DC for calculating amplifier, receives the output sampled signal of operational amplifier.P05 pin is that the pwm signal of single-chip microcontroller exports
End, connects the grid in switching tube Q1.
Specific work process are as follows:
After power supply is connected, system starts.The trigger pulse of switching tube is the pwm signal from single-chip microcontroller.Switch
When pipe Q1 is opened ,+5V power supply is applied directly to heating wire and is heated.When switching tube Q1 is turned off, since R2 resistance value is larger, heating wire
It is no longer heat up.No matter switching tube Q1, which is opened, is also off, since tool is there are two power supply, switching tube Q1 and R2 not altogether, therefore electricity
Bridge steady operation always, that is, the input terminal of operational amplifier have stable sampled signal input always.It is anti-on heating wire
Parallel diode D1 can weaken concussion and due to voltage spikes.Single-chip microcontroller generates adjustment PWM in real time according to the sampled signal received
Signal is to control the on-off of Q1.Three pins of single-chip microcontroller access electric bridge by R6, R7, R8 tri- different size of resistance
One of bridge arm, come the resistance of heating wire when changing balance, to play the role of changing temperature when heating wire is stablized.
Claims (4)
1. a kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply, including temperature collection circuit, control circuit and power interface,
It is characterized in that:
It include heating wire R1 and resistance R2, R3, R4 in the temperature collection circuit, heating wire R1 and resistance R2, R3, R4 are connected into electricity
Bridge, heating wire R1 and resistance R2 series connection are an electric bridge, and resistance R3 and resistance R4 series connection are another electric bridge, in two electric bridges
Two Differential Inputs of the point as integrator, operational amplifier use single supply integrator connection, and+5V power supply is resistance R3 and electricity
Series circuit and the operational amplifier power supply of R4 are hindered, the other end of a termination+5V of resistance R3, resistance R3 connect R4, resistance R4
The other end ground connection；The positive BAT+ of external connection battery power supply is the concatenated branch power supply of heating wire R1 and switching tube Q1, electric heating
A termination BAT+ of silk R1, another terminating resistor R2, the drain of switching tube Q1 and the in-phase end of operational amplifier of heating wire R1,
Another termination GND of resistance R2, the source level of switching tube Q1 meet external power supply cathode BAT-, and wherein BAT- voltage is zero；Diode
D1 and heating wire R1 inverse parallel, the i.e. cathode of diode D1 are connected with the positive BAT+ of external connection battery power supply, and diode D1 is just
Pole is connected to the other end of heating wire R1 and the drain electrode of switching tube Q1, weakens concussion and due to voltage spikes caused by parasitic inductance；
Between end a Jie resistance R3 and resistance R4 of resistance R5, another termination operational amplifier reverse side of resistance R5 and capacitor C1's
The output terminals A DC of one end, the output terminals A DC of another termination operational amplifier of capacitor C1, operational amplifier accesses single-chip microcontroller；Electricity
Hinder R6, R7, R8 end a Jie resistance R3 and resistance R4 between, the other end of resistance R6, R7, R8 be separately connected pin RA0,
RA1,RA2；
The control circuit be single-chip microcontroller, three pins P00, P01, P02 of single-chip microcontroller connect respectively the RA0 of temperature collection circuit,
RA1,RA2；The output pin P11 of single-chip microcontroller meets the output terminals A DC in operational amplifier, and the output for receiving operational amplifier is adopted
Sample signal；The pwm signal output pin P05 of single-chip microcontroller connects the grid in switching tube Q1；
In the temperature collection circuit, no matter switching tube Q1, which is opened, is also off, the work of electric bridge all-the-time stable, operational amplifier
Input terminal has a stable sampled signal input always, thus the output of device that operation is put is always linear；When switching tube Q1 is opened,
+ 5V power supply is applied directly to heating wire R1 and is heated；When switching tube Q1 is turned off, since R2 resistance value is larger, heating wire is no longer heat up,
Single-chip microcontroller generates adjustment pwm signal according to the sampled signal received, thus the on-off of control switch pipe Q1；Three of single-chip microcontroller
Pin accesses one of bridge arm of electric bridge, heating wire when changing balance by resistance R6, R7, R8 tri- different size of resistance
The resistance of R1, to play the role of changing temperature when heating wire is stablized.
2. a kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply according to claim 1, it is characterised in that:
The E85F3325 of 20 pin of single-chip microcontroller model of the control circuit.
3. a kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply according to claim 1, it is characterised in that:
The power interface is respectively temperature collection circuit and single-chip microcontroller power supply, and external battery supply in temperature collection circuit
BAT+ is+5V.
4. a kind of High Accuracy Constant Temperature electronic cigarette based on dual power supply according to claim 1, it is characterised in that:
In the temperature collection circuit, the resistance value of resistance R2 is 100-150 times of heating wire R1 resistance value, resistance when reaching balance
The resistance value of R4 is 100-150 times of resistance R3 resistance value.
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| CN112704266B (en) * | 2019-10-24 | 2022-08-12 | 日本烟草产业株式会社 | Power supply unit for aerosol inhaler |
| CN112704265B (en) * | 2019-10-24 | 2022-05-24 | 日本烟草产业株式会社 | Power supply unit for aerosol inhaler |
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| US11206871B2 (en) | 2019-10-24 | 2021-12-28 | Japan Tobacco Inc. | Power supply unit for aerosol inhaler |
| US11178911B2 (en) | 2019-10-28 | 2021-11-23 | Japan Tobacco Inc. | Aerosol inhaler and control device of aerosol inhaler |
| EP3815556A1 (en) * | 2019-10-28 | 2021-05-05 | Japan Tobacco Inc. | Aerosol inhaler and control device of aerosol inhaler |
| JP6728509B1 (en) * | 2020-03-05 | 2020-07-22 | 日本たばこ産業株式会社 | Power supply unit for aerosol inhalers |
| JP2021136941A (en) * | 2020-03-05 | 2021-09-16 | 日本たばこ産業株式会社 | Power supply unit of aerosol suction device |
| JP2021136942A (en) * | 2020-03-05 | 2021-09-16 | 日本たばこ産業株式会社 | Power supply unit for aerosol inhaler |
| CN113349464A (en) * | 2020-03-05 | 2021-09-07 | 日本烟草产业株式会社 | Power supply unit for aerosol inhaler |
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Effective date of registration: 20200717 Address after: Room 213, block B, Jinyuan business building, 302 Xixiang Avenue, labor community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Tuoer Microelectronics Co., Ltd Address before: 710000 Shaanxi science and technology two district road, Xi'an 72, Xi'an Software Park zero one square B201 Applicant before: XI'AN TUOER MICROELECTRONICS Co.,Ltd. |