CN110279149B - Electronic cigarette atomizer temperature compensation circuit and control method - Google Patents
Electronic cigarette atomizer temperature compensation circuit and control method Download PDFInfo
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- CN110279149B CN110279149B CN201910501390.3A CN201910501390A CN110279149B CN 110279149 B CN110279149 B CN 110279149B CN 201910501390 A CN201910501390 A CN 201910501390A CN 110279149 B CN110279149 B CN 110279149B
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- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000000889 atomisation Methods 0.000 claims abstract description 126
- 230000008569 process Effects 0.000 claims abstract description 21
- 230000008859 change Effects 0.000 claims description 19
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000009987 spinning Methods 0.000 claims 1
- 241000208125 Nicotiana Species 0.000 abstract description 24
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract description 24
- 238000010438 heat treatment Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
The invention relates to the technical field of electronic cigarettes, in particular to a temperature compensation circuit of an electronic cigarette atomizer and a control method. The circuit is arranged on the chip and is respectively connected with the atomizer and the power supply, the atomizer is internally provided with an atomization wire, the impedance of the atomization wire changes along with the temperature, and the circuit structure further comprises: the device comprises a calibration circuit module, an ADC acquisition module and a PID control module. The circuit removes critical atomization voltage and process deviation voltage simultaneously, so that the electronic cigarette atomization temperature control is more accurate, and meanwhile, the electronic atomization temperature can be accurately controlled according to the atomization points of different types of tobacco tar, so that the electronic cigarette is fully atomized, dry burning and insufficient atomization are avoided, and the taste of the electronic cigarette is improved.
Description
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to a temperature compensation circuit of an electronic cigarette atomizer and a control method.
Background
The electron cigarette adopts high temperature atomization technique, usually through the indirect temperature detection of the change of control by temperature change heater resistance under different temperatures, and the main problems of this mode include: firstly, error is introduced into the imbalance of the sampling amplifier, so that temperature estimation is inaccurate; secondly, the resistance is limited by physics along with the temperature change rule, the ADC dynamic state can not be fully utilized due to the fact that the ADC sampling is directly carried out, and the temperature estimation deviation is overlarge due to insufficient acquisition precision when the ADC is acquired in a large range, so that the taste consistency of the electronic cigarette can not be ensured.
In view of the above, it is an urgent technical problem in the art to provide a new electronic cigarette atomizer temperature compensation circuit and control method.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a temperature compensation circuit and a control method of an electronic cigarette atomizer.
The aim of the invention can be achieved by the following technical measures:
One aspect of the present invention provides an electronic cigarette atomizer temperature compensation circuit, the circuit is connected with an atomizer and a power supply, the atomizer comprises an atomizing wire, and the electronic cigarette atomizer temperature compensation circuit is characterized in that the electronic cigarette atomizer temperature compensation circuit further comprises:
The calibration circuit module comprises a critical atomization voltage eliminating circuit and an amplifying circuit which are connected, and the calibration circuit module outputs voltage to be calibrated; the critical atomization voltage eliminating circuit is connected with the output end of the power supply and is used for configuring a current source array according to a preset critical atomization voltage; the amplifying circuit is connected with the atomizer and outputs working voltage of the atomizing wire;
The ADC acquisition module is connected with the output end of the calibration circuit module and is used for acquiring the voltage to be calibrated and triggering the critical atomization voltage elimination circuit to readjust the current source array so that the first voltage output by the ADC acquisition module is consistent with the preset critical atomization voltage; continuously acquiring the working voltage of the atomized wire, and outputting a second voltage by the ADC acquisition module, wherein the second voltage is the difference value between the working voltage and the first voltage;
and the PID control module is connected with the output end of the ADC acquisition module and is used for generating a control signal according to the difference value between the second voltage and the preset atomization impedance voltage, controlling the output power of the circuit and adjusting the atomization temperature of the atomization wire.
Preferably, the voltage to be calibrated comprises: the process deviation voltage and the critical atomization voltage are obtained after the process deviation voltage is calibrated, and the second voltage is obtained after the critical atomization voltage is calibrated.
Preferably, the amplifying circuit comprises a differential amplifier, a control switch, a first resistor and a second resistor, wherein the negative phase input end of the differential amplifier is connected with the first resistor through the control switch, the first resistor is connected with the atomizing wire in series, the positive phase input end of the differential amplifier is connected with the critical atomizing voltage eliminating circuit, and the second resistor is connected with the differential amplifier in parallel.
Preferably, the resistance value of the second resistor is larger than the resistance value of the first resistor.
Preferably, the circuit further comprises a MOS switch tube, wherein the MOS switch tube is provided with a grid electrode, a source electrode and a drain electrode, the grid electrode is connected with the output end of the PID control module, the source electrode is connected with the power supply, and the drain electrode is connected with the atomizer; and the MOS switch tube controls the conduction state and the conduction time according to the control signal, so that the output power of the circuit is adjusted.
Preferably, the MOS switch tube comprises a P-type MOS switch tube or an N-type MOS switch tube.
Preferably, a memory is provided in the electronic cigarette, and the memory stores a characteristic curve of voltage corresponding to the impedance of the atomizing wire along with the change of temperature, and a preset atomizing impedance voltage and a preset critical atomizing voltage are obtained according to the characteristic curve.
Preferably, the critical atomization voltage eliminating circuit comprises a reference resistor and a current source array, wherein two ends of the current source array are respectively connected with the power supply and the reference resistor, and the current source array is used for adjusting the current source array according to the preset critical atomization voltage.
The invention also provides a control method of the temperature compensation circuit of the electronic cigarette atomizer, which comprises the following steps:
Configuring a current source array according to a preset critical atomization voltage to obtain a voltage to be calibrated;
readjusting a current source array, outputting a first voltage, and enabling the first voltage to be consistent with the preset critical atomization voltage;
acquiring working voltage of an atomized wire, and outputting second voltage which is a difference value between the working voltage and the first voltage;
and acquiring a preset atomization impedance voltage, generating a control signal according to the difference value between the second voltage and the preset atomization impedance voltage, controlling the output power of the circuit, and adjusting the atomization temperature of the atomization wire.
Preferably, the voltage to be calibrated comprises: the process deviation voltage and the critical atomization voltage are obtained after the process deviation voltage is calibrated, and the second voltage is obtained after the critical atomization voltage is calibrated.
According to the electronic cigarette atomizer temperature compensation circuit, the current source array is adjusted according to the preset critical atomization temperature, the voltage to be calibrated is removed, so that the electronic cigarette atomization temperature is controlled more accurately, meanwhile, the electronic cigarette can be fully atomized according to the atomization points of different types of tobacco tar, dry burning and insufficient atomization are avoided, and the taste of the electronic cigarette is improved.
Drawings
Fig. 1 is a schematic circuit configuration of the present invention.
Fig. 2 is a schematic diagram of the calibration circuit module of the present invention.
Fig. 3 is a characteristic curve of voltage versus temperature for an atomized wire impedance.
Fig. 4 is a schematic diagram of the current flow when the control switch is open.
Fig. 5 is a schematic diagram of the current flow when the control switch is closed.
Fig. 6 is a schematic diagram of the input voltage of the ADC acquisition module versus the atomizer temperature.
Fig. 7 is a flowchart of a control method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order that the present disclosure may be more fully described and fully understood, the following description is provided by way of illustration of embodiments and specific examples of the present invention; this is not the only form of practicing or implementing the invention as embodied. The description covers the features of the embodiments and the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and sequences of steps.
The embodiment of the invention discloses a temperature compensation circuit and a control method of an electronic cigarette atomizer, which remove critical atomization voltage and process deviation voltage at the same time, so that the control of the atomization temperature of the electronic cigarette is more accurate, and meanwhile, the atomization temperature of the electronic cigarette can be accurately controlled according to the atomization points of different types of tobacco tar, so that the electronic cigarette is fully atomized, dry burning and insufficient atomization are avoided, and the taste of the electronic cigarette is improved.
Fig. 1 shows a temperature compensation circuit of an electronic cigarette atomizer, please refer to fig. 1, the circuit is disposed on a chip 10, the circuit is respectively connected with an atomizer 20 and a power supply 30, the atomizer 20 includes an atomization wire 201 therein, the impedance of the atomization wire 201 varies with the temperature, the circuit further includes: calibration circuit module 40, ADC acquisition module 50, and PID control module 60.
Further, referring to fig. 2, the calibration circuit module 40 includes a critical atomization voltage eliminating circuit 401 and an amplifying circuit 402 connected to each other, and the calibration circuit module 40 is configured to output a voltage to be calibrated, where the voltage to be calibrated includes a process deviation voltage and a critical atomization voltage, and the process deviation voltage is an error introduced by the differential amplifier 4020 and a resistor and a capacitor inside the chip 10 along with a process change.
Referring to fig. 1, a threshold voltage cancellation circuit 401 is connected to an output terminal of the power supply 30, and is configured to generate a threshold voltage of the atomized filaments 201 according to a preset threshold voltage.
The circuit is suitable for different tobacco tar types, the preset critical atomization voltage is changed according to the change of the tobacco tar type, and the characteristic curve of the voltage corresponding to the impedance of the atomization wire 201 along with the change of the temperature is obtained according to the characteristic curve of the impedance of the atomization wire 201 along with the change of the temperature when certain tobacco tar is heated, as shown in fig. 3. The critical atomization voltage is the voltage of the atomized wire 201 near the atomization temperature of the tobacco tar, for example: the smoke oil atomization temperature is 250 ℃, and the critical atomization voltage can be 150 ℃ or 200 ℃.
The amplifying circuit 402 is connected to the atomizer 20 and outputs an operating voltage of the atomizing wire 201. Referring to fig. 1, the ADC collecting module 50 is connected to an output end of the calibration circuit module 40, and is configured to collect a voltage to be calibrated and trigger the critical atomization voltage eliminating circuit 401 to readjust the current source array, so that a first voltage output by the ADC collecting module 50 is identical to a preset critical atomization voltage, the first voltage is obtained after removing an influence of a process deviation voltage, and when the working voltage is continuously obtained, the ADC collecting module 50 outputs a second voltage, which is a difference between the working voltage and the first voltage, and the second voltage is obtained after removing an influence of the critical atomization voltage.
Referring to fig. 1, the pid control module 60 is connected to an output end of the ADC acquisition module 50, and is configured to generate a control signal according to a difference between the second voltage and a preset atomization impedance voltage, control an output power of the circuit, and adjust an atomization temperature of the atomization wire 201.
The larger the power loaded on the atomizing wire 201, the larger the heating value of the atomizing wire 201, the larger the impedance of the atomizing wire 201, and the higher the temperature of heating the tobacco tar, whereas the smaller the power loaded on the atomizing wire 201, the smaller the heating value of the atomizing wire 201, the smaller the impedance of the atomizing wire 201, and the lower the temperature of heating the tobacco tar.
The preset atomization impedance voltage in this embodiment is a result of subtracting the critical atomization voltage from the atomization temperature corresponding voltage. The temperature compensation circuit of the electronic cigarette atomizer simultaneously removes critical atomization voltage and process deviation voltage through the calibration circuit module 40, accurately controls atomization temperatures of different tobacco tar and ensures taste consistency of the electronic cigarette.
Further, a memory (not shown in the figure) is provided in the electronic cigarette, preferably, the memory is provided on the chip 10, the memory stores a characteristic curve of voltage corresponding to the impedance of the atomizing wire 201 along with the change of temperature, and according to a preset atomizing impedance voltage and a preset critical atomizing voltage obtained by the characteristic curve, as shown in fig. 3, the relationship between the voltage of the atomizing wire 201 and the temperature can be known from the characteristic curve. The circuit can be applicable to different types of tobacco tar, can call the information on the memory according to user's demand, match the atomizing temperature that corresponds the tobacco tar according to different types of tobacco tar for the electron cigarette can fully atomize, promotes the taste of electron cigarette.
Further, referring to fig. 1 and 2, the threshold-atomizing-voltage eliminating circuit 401 includes a reference resistor 4010 and a current source array 4011, two ends of the current source array 4011 are respectively connected to the power supply 30 and the reference resistor 4010, the current source array 4011 is used for adjusting the current source array according to a preset threshold atomizing voltage, and the threshold-atomizing-voltage eliminating circuit 401 configures the current source array according to a type of tobacco tar (different preset threshold atomizing voltages of different tobacco tar), so as to generate the threshold atomizing voltage of the atomizing wire 201.
Further, a single-chip microcomputer (not shown in the figure) is arranged in the electronic cigarette, the single-chip microcomputer is respectively connected with the output end of the ADC acquisition module 50 and the current source array 4011, and the single-chip microcomputer can process information output by the ADC acquisition module 50 and control the current source array 4011 to adjust the current source array. When the first voltage output by the ADC acquisition module 50 is inconsistent with the preset critical atomization voltage, the singlechip controls the current source array 4011 to adjust the current source array, so that the first voltage output by the ADC acquisition module 50 is consistent with the preset critical atomization voltage.
Further, referring to fig. 2, the amplifying circuit 402 includes a differential amplifier 4020, a control switch 4021, a first resistor 4022 and a second resistor 4023, wherein the resistance of the second resistor 4023 is K times that of the first resistor 4022, in this embodiment, K is between 2 and 3, the negative phase input end of the differential amplifier 4020 is connected with the first resistor 4022 through the control switch 4021, the first resistor 4022 is connected with the atomizing wire 201 of the atomizer 20 in series, the positive phase input end of the differential amplifier 4020 is connected with a reference resistor 4010 and a current source array 4011 respectively, and the second resistor 4023 is connected with the differential amplifier 4020 in parallel.
The atomizing silk 201 contacts with the tobacco tar to be atomized, the power supply 30 supplies power to the atomizing silk 201, the atomizing silk 201 generates heat, electric energy is converted into heat energy to heat the tobacco tar, the impedance of the atomizing silk 201 on the atomizing silk in the heating process is continuously changed, the resistance value of the first resistor 4022 is unchanged and is connected with the atomizing silk 201 in series, the first resistor 4022 collects the current value I loaded on the atomizing silk 201, the atomizing silk 201 is connected with the first resistor 4022 in series, the current value on the atomizing silk is also I, and the real-time working voltage loaded on the atomizing silk 201 is obtained through U=I.R.
Further, the singlechip is connected with the control switch 4021, and the singlechip controls the on-off state of the control switch 4021 by monitoring pressure sensing, wherein the pressure sensing is generated when a user sucks the electronic cigarette.
Specifically, when the user draws the electronic cigarette, the singlechip monitors that there is pressure sensing, and when the control switch 4021 is turned off, the ADC acquisition module 50 acquires the voltage to be calibrated, and triggers the critical atomization voltage elimination circuit 401 to readjust the current source array, so that the first voltage output by the ADC acquisition module 50 is consistent with the preset critical atomization voltage stored in the memory. The first voltage is the calibrated critical atomization voltage at this time, then when the control switch 4021 is closed, the ADC acquisition module 50 obtains the working voltage output by the amplifying circuit 402, calculates a difference value according to the working voltage and the first voltage, removes the critical atomization voltage, and outputs the second voltage. By removing the influence of the critical atomization voltage and the process deviation voltage, the dynamic use efficiency and the loop response range of the ADC acquisition module 50 can be improved, the atomization temperature of the electronic cigarette can be further accurate, and the consistency of the mouthfeel of the electronic cigarette can be improved.
Further, referring to fig. 1, the circuit further includes a MOS switch tube 70, a gate 701 of the MOS switch tube 70 is connected to an output end of the PID control module 60, a source 702 of the MOS switch tube 70 is connected to the power supply 30, and a drain 703 of the MOS switch tube 70 is connected to the atomizer 20; the MOS switch tube 70 controls the on state and the on time according to the control signal, and adjusts the output power of the circuit, thereby changing the temperature of the atomizing wire 201.
Further, the MOS switch transistor 70 includes a P-type MOS switch transistor or an N-type MOS switch transistor.
Specifically, in this embodiment, the impedance of the atomizing wire 201 increases linearly with the temperature, and the temperature is obtained in real time after the voltage corresponding to the impedance of the atomizing wire 201 is calculated according to the impedance and the current of the atomizing wire 201. When the second voltage is smaller than the preset atomization impedance voltage, the PID control module 60 controls the conduction state and the conduction time of the MOS switch tube 70 to increase the power loaded on the atomization wire 201, so that the temperature rises to reach the atomization point; when the second voltage is greater than the preset atomizing impedance voltage, the PID control module 60 controls the on state and the on time of the MOS switch tube 70 to reduce the power loaded on the atomizing wire 201, so that the temperature is reduced to the atomizing point. In practical application, the user can select the type of tobacco tar according to his own taste requirement, the preset atomization impedance voltage also changes along with the change of the tobacco tar type, and the PID control module 60 adjusts the duty ratio according to the difference between the calibrated working voltage and the preset atomization impedance voltage, so as to adjust the on state and the on time of the MOS switch tube 70, further adjust the output power, and achieve the purpose of continuously adjusting the atomization temperature, so that the electronic cigarette is fully atomized, dry burning and insufficient atomization are avoided, and the taste of the electronic cigarette is improved.
More specifically, as shown in fig. 4, the control switch 4021 is turned off and the MOS switch 70 is turned off (when the MOS switch 70 is an N-type MOS switch, the gate 701 is pulled down, and when the MOS switch 70 is a P-type MOS switch, the gate 701 is pulled up), the reference resistor 4010 and the current source array 4011 together form a positive input end of the differential amplifier 4020, and the current flows to the positive input end of the differential amplifier 4020, as shown in fig. 4, at this time, the critical atomization voltage eliminating circuit 401 adjusts the current source array to make the first voltage of the ADC acquisition module 50 equal to the preset critical atomization voltage in the memory, so as to obtain the calibrated critical atomization voltage, avoid the influence of errors caused by process variations of resistances and capacitances inside the differential amplifier 4020 and the chip 10, and in the subsequent control flow, the critical atomization voltage of the atomizing wire 201 is removed through the positive input end of the differential amplifier 4020; the control switch 4021 is closed and is simultaneously connected with the grid 701 of the MOS switch tube 70, the current flow direction is shown in fig. 5, the ADC acquisition module 50 measures and acquires the current working voltage of the atomizing wire 201 through the amplifying circuit 402, calculates a difference value according to the working voltage and the first voltage, removes the critical atomizing voltage, outputs a second voltage, the PID control module 60 compares the second voltage with a preset atomizing impedance voltage to obtain a difference value, calculates the on duty ratio by using a PID algorithm, generates a control signal, adjusts the on state and the on time of the MOS switch tube 70 according to the control signal, adjusts the output power of the circuit, controls the temperature of the atomizing wire 201, ensures that the atomizing temperature of the electronic cigarette is more accurate, and ensures the consistency of the taste of the electronic cigarette. The larger the power loaded on the atomizing wire 201, the larger the heating value of the atomizing wire 201, the larger the impedance of the atomizing wire 201, and the higher the temperature of heating the tobacco tar, whereas the smaller the power loaded on the atomizing wire 201, the smaller the heating value of the atomizing wire 201, the smaller the impedance of the atomizing wire 201, and the lower the temperature of heating the tobacco tar.
As shown in fig. 6, through experiments, the voltage change Δr at the input end of the ADC acquisition module 50 is changed to Δt2 according to the temperature change in a conventional sampling manner, as shown in a change curve B. With the circuit of this embodiment, the critical atomization voltage eliminating circuit 401 sets a current source array according to different preset critical atomization voltages corresponding to different types of tobacco tar, and calibrates errors introduced by the internal resistances and capacitances of the differential amplifier 4020 and the chip 10 along with the process, as shown in a change curve a, the voltage change Δr at the input end of the ADC acquisition module 50 corresponds to the temperature change to Δt1, where Δt1 is approximately equal to Δt2/K. Therefore, in this embodiment, by increasing the slope of the pressure drop and the temperature of the atomizing wire 201, the same ADC acquisition module 50 input voltage changes to a smaller temperature change range, which significantly improves the control accuracy of the atomizing temperature of the electronic cigarette and ensures the taste consistency of the electronic cigarette.
Still another embodiment of the present invention provides a control method of a temperature control circuit of an electronic cigarette, referring to fig. 7, the control method includes:
step S1: configuring a current source array according to a preset critical atomization voltage to obtain a voltage to be calibrated;
specifically, in this embodiment, the electronic cigarette may be suitable for different types of tobacco tar, and different atomization temperatures and different preset critical atomization voltages are matched according to different types of tobacco tar. Further, the voltage to be calibrated includes: process bias voltage and critical atomization voltage.
Step S2: readjusting a current source array, outputting a first voltage, and enabling the first voltage to be consistent with the preset critical atomization voltage;
When the control switch is turned off, the ADC acquisition module acquires voltage to be calibrated and triggers the critical atomization voltage eliminating circuit to readjust the current source array, so that the first voltage output by the ADC acquisition module is consistent with the preset critical atomization voltage stored in the memory. The first voltage is the critical atomization voltage after the calibration process deviation voltage. In the step, a dichotomy or a successive approximation mode is adopted to readjust the current source array, and the first voltage is calibrated to a preset critical atomization voltage.
Step S3: acquiring working voltage of an atomized wire, and outputting second voltage which is a difference value between the working voltage and the first voltage;
when the control switch is closed, the ADC acquisition module acquires the working voltage output by the amplifying circuit, calculates a difference value according to the working voltage and the first voltage, removes the critical atomization voltage and outputs a second voltage.
Step S4: and acquiring a preset atomization impedance voltage, generating a control signal according to the difference value between the second voltage and the preset atomization impedance voltage, controlling the output power of the circuit, and adjusting the atomization temperature of the atomization wire.
The PID control module adjusts the duty ratio according to the difference value between the second voltage and the preset atomization impedance voltage (the preset atomization impedance voltage is the result of subtracting the critical atomization voltage from the atomization temperature corresponding voltage), so that the conduction state and the conduction time of the MOS switch tube are adjusted, the output power is further adjusted, the purpose of continuously adjusting the atomization temperature is achieved, the atomization temperature of the electronic cigarette is more accurate, and the consistency of the mouthfeel of the electronic cigarette is ensured.
Specifically, when the second voltage is smaller than the preset atomization impedance voltage, the PID control module controls the conduction state and the conduction time of the MOS switch tube to improve the power loaded on the atomization wire, so that the temperature rises to reach an atomization point; when the second voltage is larger than the preset atomization impedance voltage, the PID control module controls the conduction state and the conduction time of the MOS switch tube to reduce the power loaded on the atomization wire, so that the temperature is reduced to an atomization point.
Further, the control method further includes:
The electronic cigarette is provided with a memory, wherein the memory stores a characteristic curve of voltage corresponding to the impedance of the atomizing wire along with the change of temperature, and the preset atomizing impedance voltage and the preset critical atomizing voltage are obtained according to the characteristic curve.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The utility model provides an electron smog spinning disk atomiser temperature compensation circuit, this circuit connection atomizer and power, the atomizer is including atomizing silk, its characterized in that, this circuit still includes:
The calibration circuit module comprises a critical atomization voltage eliminating circuit and an amplifying circuit which are connected, and the calibration circuit module outputs voltage to be calibrated; the critical atomization voltage eliminating circuit is connected with the output end of the power supply and is used for configuring a current source array according to a preset critical atomization voltage; the amplifying circuit is connected with the atomizer and outputs working voltage of the atomizing wire;
The ADC acquisition module is connected with the output end of the calibration circuit module and is used for acquiring the voltage to be calibrated and triggering the critical atomization voltage elimination circuit to readjust the current source array so that the first voltage output by the ADC acquisition module is consistent with the preset critical atomization voltage; continuously acquiring the working voltage of the atomized wire, and outputting a second voltage by the ADC acquisition module, wherein the second voltage is the difference value between the working voltage and the first voltage;
the PID control module is connected with the output end of the ADC acquisition module and is used for generating a control signal according to the difference value between the second voltage and the preset atomization impedance voltage, controlling the output power of the circuit and adjusting the atomization temperature of the atomization wire;
The amplifying circuit comprises a differential amplifier, a control switch, a first resistor and a second resistor, wherein the negative phase input end of the differential amplifier is connected with the first resistor through the control switch, the first resistor is connected with the atomizing wire in series, the positive phase input end of the differential amplifier is connected with the critical atomizing voltage eliminating circuit, and the second resistor is connected with the differential amplifier in parallel;
the critical atomization voltage eliminating circuit comprises a reference resistor and a current source array, wherein two ends of the current source array are respectively connected with the power supply and the reference resistor, and the current source array is used for adjusting the current source array according to the preset critical atomization voltage.
2. The electronic vaping atomizer temperature compensation circuit of claim 1, wherein the voltage to be calibrated comprises: the process deviation voltage and the critical atomization voltage are obtained after the process deviation voltage is calibrated, and the second voltage is obtained after the critical atomization voltage is calibrated.
3. The electronic atomizer temperature compensation circuit of claim 1 wherein the second resistor has a resistance greater than the resistance of the first resistor.
4. The electronic cigarette atomizer temperature compensation circuit of claim 1 further comprising a MOS switch tube, said MOS switch tube having a gate, a source and a drain, said gate connected to an output of said PID control module, said source connected to said power source, said drain connected to said atomizer; and the MOS switch tube controls the conduction state and the conduction time according to the control signal, so that the output power of the circuit is adjusted.
5. The electronic cigarette atomizer temperature compensation circuit of claim 4 wherein the MOS switch tube comprises a P-type MOS switch tube or an N-type MOS switch tube.
6. The electronic cigarette atomizer temperature compensation circuit according to claim 1, wherein a memory is provided in the electronic cigarette, the memory stores a characteristic curve of voltage corresponding to the impedance of the atomizing wire along with temperature change, and the preset atomizing impedance voltage and the preset critical atomizing voltage are obtained according to the characteristic curve.
7. A control method of an electronic cigarette atomizer temperature compensation circuit, characterized in that it is applied to an electronic cigarette atomizer temperature compensation circuit according to any one of claims 1 to 6, the control method comprising:
Configuring a current source array according to a preset critical atomization voltage to obtain a voltage to be calibrated;
readjusting a current source array, outputting a first voltage, and enabling the first voltage to be consistent with the preset critical atomization voltage;
acquiring working voltage of an atomized wire, and outputting second voltage which is a difference value between the working voltage and the first voltage;
and acquiring a preset atomization impedance voltage, generating a control signal according to the difference value between the second voltage and the preset atomization impedance voltage, controlling the output power of the circuit, and adjusting the atomization temperature of the atomization wire.
8. The control method according to claim 7, wherein the voltage to be calibrated comprises: the process deviation voltage and the critical atomization voltage are obtained after the process deviation voltage is calibrated, and the second voltage is obtained after the critical atomization voltage is calibrated.
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| CN110594783B (en) * | 2019-10-15 | 2021-04-06 | 重庆利迈陶瓷技术有限公司 | Control strategy for hot-face igniter |
| CN111820482B (en) * | 2020-06-29 | 2023-07-18 | 深圳麦克韦尔科技有限公司 | Battery pole, atomizer and electronic atomizing device |
| CN111920108B (en) * | 2020-09-07 | 2023-11-14 | 歌尔微电子股份有限公司 | Temperature control method and device, electronic cigarette and readable storage medium |
| CN112353004B (en) * | 2020-11-11 | 2024-09-17 | 东莞市亿海电子有限公司 | Electronic cigarette temperature calibration method, electronic cigarette, controller and readable storage medium |
| CN113607329B (en) * | 2021-07-13 | 2022-10-18 | 复旦大学 | Pressure sensor signal temperature compensation method and pressure sensor |
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