CN112471596A - Electronic cigarette and electronic cigarette protection circuit - Google Patents
Electronic cigarette and electronic cigarette protection circuit Download PDFInfo
- Publication number
- CN112471596A CN112471596A CN202011412360.4A CN202011412360A CN112471596A CN 112471596 A CN112471596 A CN 112471596A CN 202011412360 A CN202011412360 A CN 202011412360A CN 112471596 A CN112471596 A CN 112471596A
- Authority
- CN
- China
- Prior art keywords
- atomizer
- electronic cigarette
- control chip
- microphone
- protection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 8
- 230000000391 smoking effect Effects 0.000 abstract description 7
- 241000208125 Nicotiana Species 0.000 description 5
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 5
- ZHBBDTRJIVXKEX-UHFFFAOYSA-N 1-chloro-2-(3-chlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C(=CC=CC=2)Cl)=C1 ZHBBDTRJIVXKEX-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/10—Devices using liquid inhalable precursors
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/50—Control or monitoring
- A24F40/53—Monitoring, e.g. fault detection
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The invention relates to an electronic cigarette and a protection circuit thereof, comprising a battery cell, an atomizer and a control circuit, wherein the control circuit comprises a microphone, a control chip and a protection module; the input end of the control chip is connected with the battery cell, the power output end of the control chip is connected with the atomizer, the switch conversion end of the control chip is connected with the microphone, and the microphone and the atomizer are both grounded through the protection module; when the electronic cigarette works abnormally, the control chip automatically works when smoking action is not detected through the microphone, the current output through the power output pin is increased, the overcurrent protection circuit detects the increase of the current, the output of the chip power is cut off, and the overcurrent protection function is realized.
Description
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette and an electronic cigarette protection circuit.
Background
Along with the development of electronic cigarettes, the safety of the electronic cigarettes is more and more emphasized; the abnormal working problem that the tobacco tar or other liquid enters the cavity of the microphone controller or is attached to the electronic component can cause the chip to be out of control or the electronic cigarette to automatically work, the current in the circuit is increased, the temperature of the electric core or the atomizer is increased, and the electric core or the atomizer can be burnt in serious conditions.
Disclosure of Invention
The present invention is directed to provide a protection circuit for an electronic cigarette, which overcomes the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
constructing an electronic cigarette protection circuit, which comprises a battery cell, an atomizer and a control circuit; the control circuit comprises a microphone, a control chip and a protection module; the input end of the control chip is connected with the battery cell, the power output end of the control chip is connected with the atomizer, the switch conversion end of the control chip is connected with the microphone, and the microphone and the atomizer are grounded through the protection module.
Preferably, the protection module specifically includes a thermistor, one end of the thermistor is connected with the atomizer, and the other end of the thermistor is grounded.
Preferably, the protection module specifically comprises a unidirectional thyristor, a triode, a switch and a detection resistor, wherein the anode of the unidirectional thyristor is connected with the atomizer, the cathode of the unidirectional thyristor is grounded through the detection resistor, the gate of the unidirectional thyristor is connected with the atomizer through the switch, the base of the triode is connected with the cathode of the unidirectional thyristor, the collector of the triode is connected with the atomizer, and the emitter of the unidirectional thyristor is grounded.
Preferably, the protection module further includes a voltage dividing resistor connected in series with the switch K.
Preferably, the control circuit further includes a filter capacitor connected in parallel with the battery cell.
Preferably, the LED end of the control chip is connected to a light emitting diode, and is grounded through the light emitting diode D1.
The invention also provides an electronic cigarette, and the electronic cigarette protection circuit comprises a shell and a PCB board on which the control chip and the protection module are arranged, wherein the microphone, the battery cell, the PCB board and the atomizer are sequentially arranged in the shell.
The invention has the beneficial effects that: when the electronic cigarette normally works, the control chip detects smoking action through the microphone, and controls current to flow through the atomizer and the protection module through the power output pin, the atomizer atomizes tobacco tar, and the protection module can be regarded as a lead or a low-resistance resistor at the moment and does not influence a circuit; when the electronic cigarette works abnormally, the control chip automatically works when smoking action is not detected through the microphone, the current output through the power output pin is increased, the protection module detects the current increase, the output of the chip power is cut off, and the overcurrent protection function is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
figure 1 is a schematic diagram of a control circuit of an electronic cigarette protection circuit according to a first embodiment of the invention;
figure 2 is a schematic diagram of a control circuit of an electronic cigarette protection circuit according to a second embodiment of the invention;
figure 3 is a schematic view of an electronic cigarette of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
The electronic cigarette protection circuit disclosed by the invention is shown in fig. 1 and referring to fig. 2-3, and comprises a battery cell 1, an atomizer 2 and a control circuit 3, wherein the control circuit 3 comprises a microphone C1, a control chip U1 and a protection module 4; the input end of the control chip U1 is connected with the battery cell 1, the power output end is connected with the atomizer 2, the switch conversion end is connected with the microphone C1, and the microphone C1 and the atomizer 2 are both grounded through the protection module 4; when the electronic cigarette normally works, the control chip U1 detects smoking action through the microphone C1, and controls current to flow through the atomizer 2 and the protection module 4 through the power output pin, the atomizer 2 atomizes tobacco tar, and the overcurrent protection circuit can be regarded as a lead or a low-resistance resistor at the moment and does not influence the circuit; when the electronic cigarette normally works, the control chip U1 automatically works when smoking action is not detected through the microphone C1, the current output through the power output pin is increased, the protection module 4 detects the current increase, the output of the chip power is cut off, and the overcurrent protection function is realized.
First embodiment as shown in fig. 1, the protection module 4 specifically includes a thermistor 41, one end of the thermistor 41 is connected to the atomizer 2, and the other end is grounded; when the electronic cigarette normally works, the control chip U1 detects smoking action through the microphone C1, and controls current to flow through the atomizer 2 and the overcurrent protection circuit through the power output pin, the atomizer 2 atomizes tobacco tar, and the thermistor 41 can be regarded as a lead or a low-resistance resistor at the moment and does not influence the circuit; when the electronic cigarette abnormally works, the control chip U1 automatically works when smoking action is not detected through the microphone C1, the current output through the power output pin is increased, the current detected by the thermistor 41 is increased, the current exceeds the circuit working current, the resistance value is increased to infinity, the circuit is regarded as open circuit, the output of the chip power is cut off, and the overcurrent protection function is realized; if the thermistor 41 detects that the current is reduced to be below the circuit working current value, the original resistance value can be automatically recovered, and the circuit can continue to work normally; the thermistor 41 detects that the temperature rises and exceeds the working temperature of elements in the control circuit, the resistance value is increased, and the power output of the control U1 is cut off; the thermistor 41 can also function as an over-temperature protection.
As shown in fig. 2, the protection module 4 specifically includes a unidirectional thyristor Q2, a transistor Q1, a switch K1, and a detection resistor R2, the anode of the unidirectional thyristor Q2 is connected to the atomizer 2, the cathode is grounded through the detection resistor R2, the gate is connected to the atomizer 2 through the switch K1, the base of the transistor Q1 is connected to the cathode of the unidirectional thyristor Q2, the collector is connected to the atomizer 2, and the emitter is grounded; the resistance value of the detection resistor R2 is R1 ═ Uq/Io, wherein Uq is the conducting voltage of the triode Q1, and Io is the maximum working current of the charging circuit; the triode Q1 is an NPN type triode, and when the switch is pressed down, the unidirectional thyristor Q2 is turned on, the current detected by the detection resistor R2 exceeds Io, the triode Q1 is turned on, and at this time, the voltage between the collector and the base of the triode Q1 drops to be lower than the maintaining voltage of the conduction of the unidirectional thyristor Q2, and the unidirectional thyristor Q2 is turned off, thereby playing a role in current protection.
As shown in fig. 3, the protection module 4 further includes a voltage dividing resistor R3 connected in series with the switch K1; the voltage is divided by the voltage dividing resistor R3, so that the power supply is prevented from breaking down the unidirectional thyristor Q2.
As shown in fig. 1, the control circuit 3 further includes a filter capacitor C2 connected in parallel with the battery cell 1; preventing noise from interfering with the output of the power supply.
As shown in fig. 1, the LED terminal of the control chip U1 is connected with a light emitting diode D1 and is grounded through a light emitting diode D1; the state of the electronic cigarette is indicated through the light-emitting diode.
The invention also provides an electronic cigarette, based on the electronic cigarette protection circuit, as shown in fig. 3, the electronic cigarette comprises a shell 5, a PCB 6 on which a control chip U1 and a protection module 4 are arranged, a microphone C1, a battery cell 1, the PCB 6, and an atomizer 2 which are sequentially arranged in the shell 5; set up PCB board 6 in the position that is close to atomizer 2, can detect the temperature of atomizer 2 through thermistor, when the tobacco tar is not enough in atomizer 2, the heater burns empty, leads to atomizer 2 temperature rising, leads to thermistor R1 temperature rising, and the resistance increases, makes control circuit be in and opens circuit, has played overheat protection's effect.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (7)
1. An electronic cigarette protection circuit comprises a battery cell (1), an atomizer (2) and a control circuit (3); the microphone is characterized in that the control circuit (3) comprises a microphone (C1), a control chip (U1) and a protection module (4); the input end of the control chip (U1) is connected with the battery core (1), the power output end of the control chip is connected with the atomizer (2), the switch conversion end of the control chip is connected with the microphone (C1), and the microphone (C1) and the atomizer (2) are grounded through the protection module (4).
2. The electronic cigarette protection circuit according to claim 1, wherein the protection module (4) specifically comprises a thermistor (41), and one end of the thermistor (41) is connected to the atomizer (2), and the other end is grounded.
3. The electronic cigarette protection circuit according to claim 1, characterized in that the protection module (4) specifically comprises a unidirectional thyristor (Q2), a transistor (Q1), a switch (K1) and a detection resistor (R2), wherein the anode of the unidirectional thyristor (Q2) is connected to the atomizer (2), the cathode is grounded via the detection resistor (R2), the gate is connected to the atomizer (2) via the switch (K1), the base of the transistor (Q1) is connected to the cathode of the unidirectional thyristor (Q2), the collector is connected to the atomizer (2), and the emitter is grounded.
4. The electronic cigarette protection circuit according to claim 3, characterized in that the charge protection module (7) further comprises a voltage dividing resistor (R3) in series with the switch (K1).
5. The electronic cigarette protection circuit according to claim 1, characterized in that the control circuit (3) further comprises a filter capacitance (C2) connected in parallel with the electric core (1).
6. The electronic cigarette protection circuit according to claim 1, wherein a light emitting diode (D1) is connected to the LED terminal of the control chip (U1), and is grounded through the light emitting diode (D1).
7. An electronic cigarette based on the protection circuit of claim 1-6, characterized by comprising a housing (5), and a PCB (6) on which the control chip (U1) and the protection module (4) are disposed, wherein the microphone (C1), the electric core (1), the (PCB) board (6), and the atomizer (2) are sequentially disposed in the housing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412360.4A CN112471596A (en) | 2020-12-03 | 2020-12-03 | Electronic cigarette and electronic cigarette protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412360.4A CN112471596A (en) | 2020-12-03 | 2020-12-03 | Electronic cigarette and electronic cigarette protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112471596A true CN112471596A (en) | 2021-03-12 |
Family
ID=74938123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011412360.4A Pending CN112471596A (en) | 2020-12-03 | 2020-12-03 | Electronic cigarette and electronic cigarette protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112471596A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104473331A (en) * | 2014-12-01 | 2015-04-01 | 西安拓尔微电子有限责任公司 | Novel electronic cigarette with tobacco tar detecting function |
| CN205544199U (en) * | 2016-02-02 | 2016-08-31 | 铂胜节能环保科技(深圳)有限公司 | LED overvoltage protection control circuit |
| CN107333348A (en) * | 2017-07-07 | 2017-11-07 | 佛山领新信息科技有限公司 | A kind of voltage-stabilizing protection power supply for micro-wave oven |
| CN207328334U (en) * | 2017-05-05 | 2018-05-08 | 湖南汽车工程职业学院 | A kind of inter-vehicle information system power supply circuit |
| CN208461444U (en) * | 2018-05-07 | 2019-02-01 | 刘军 | The leakage protection circuit of household electrical appliance |
| WO2019033887A1 (en) * | 2017-08-15 | 2019-02-21 | 惠州市新泓威科技有限公司 | Dry-burning prevention device of electronic cigarette and control method therefor |
| CN109998179A (en) * | 2019-05-14 | 2019-07-12 | 威尔普斯科技(东莞)有限公司 | Smoke grenade, electronic cigarette and temprature control method |
| CN210471028U (en) * | 2019-08-26 | 2020-05-08 | 常州市派腾电子技术服务有限公司 | Control circuit of electronic cigarette and electronic cigarette thereof |
| CN111557475A (en) * | 2020-05-30 | 2020-08-21 | 杭州尚格半导体有限公司 | Electronic atomization device and control circuit and control method thereof |
-
2020
- 2020-12-03 CN CN202011412360.4A patent/CN112471596A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104473331A (en) * | 2014-12-01 | 2015-04-01 | 西安拓尔微电子有限责任公司 | Novel electronic cigarette with tobacco tar detecting function |
| CN205544199U (en) * | 2016-02-02 | 2016-08-31 | 铂胜节能环保科技(深圳)有限公司 | LED overvoltage protection control circuit |
| CN207328334U (en) * | 2017-05-05 | 2018-05-08 | 湖南汽车工程职业学院 | A kind of inter-vehicle information system power supply circuit |
| CN107333348A (en) * | 2017-07-07 | 2017-11-07 | 佛山领新信息科技有限公司 | A kind of voltage-stabilizing protection power supply for micro-wave oven |
| WO2019033887A1 (en) * | 2017-08-15 | 2019-02-21 | 惠州市新泓威科技有限公司 | Dry-burning prevention device of electronic cigarette and control method therefor |
| CN208461444U (en) * | 2018-05-07 | 2019-02-01 | 刘军 | The leakage protection circuit of household electrical appliance |
| CN109998179A (en) * | 2019-05-14 | 2019-07-12 | 威尔普斯科技(东莞)有限公司 | Smoke grenade, electronic cigarette and temprature control method |
| CN210471028U (en) * | 2019-08-26 | 2020-05-08 | 常州市派腾电子技术服务有限公司 | Control circuit of electronic cigarette and electronic cigarette thereof |
| CN111557475A (en) * | 2020-05-30 | 2020-08-21 | 杭州尚格半导体有限公司 | Electronic atomization device and control circuit and control method thereof |
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