Control circuit for an electronic cigarette and electronic cigarette

Abstract

The application discloses a control circuit for an electronic cigarette and the electronic cigarette, and the control circuit for the electronic cigarette comprises a heating module, a capacitive sensor, a constant current source, a timing module and a control module; the heating module is arranged in the inside of a shell; the capacitive sensor is arranged in a circuit area of the shell, and the air flow blown by a user along an air channel and an air inlet hole changes the capacitance value of the capacitive sensor; the constant current source charges the capacitive sensor; the timing module is electrically connected with the constant current source and is used for calculating the charging duration of the constant current source to obtain a target charging duration; wherein the target charging duration is determined according to the capacitance value of the capacitive sensor; the control module is electrically connected with the timing module and the heating module, and is used for determining the state information of the capacitive sensor according to the target charging duration and a preset duration range, and controlling the heating module to start or shut down according to the state information. The application can improve the accuracy of starting and shutting down of the electronic cigarette and reduce the start and stop control caused by misoperation.

Description

Technical Field

[0001] This invention relates to the technical field of voltage regulation circuits, and in particular to a control circuit for electronic cigarettes and an electronic cigarette. Background Technology

[0002] Currently, e-cigarettes are mainly controlled by blowing and inhaling to turn them on or off. However, traditional inhalation and blowing are primarily controlled by capacitive sensors, which adjust the sensor's sensitivity to activate or deactivate the e-cigarette. If the user accidentally activates the e-cigarette, it will negatively impact the user experience. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a control circuit for electronic cigarettes that can accurately perform electronic cigarette activation operations, reduce false activations, and improve the user experience of using electronic cigarettes.

[0004] The present invention also proposes an electronic cigarette.

[0005] In a first aspect, one embodiment of the present invention provides a control circuit for an electronic cigarette, applied to an electronic cigarette, the electronic cigarette comprising: a housing and a fiberglass tube, the housing having a circuit region therein, the control circuit being housed in the circuit region of the housing, an air inlet hole being provided at the bottom of the housing and in the circuit region, the fiberglass tube being disposed within the housing and having an air passage communicating with the air inlet hole, the control circuit comprising:

[0006] A heating module is disposed inside the housing and is connected to the fiberglass tube and communicates with the air passage;

[0007] A capacitive sensor is disposed in the circuit area of ​​the housing, and the capacitance value of the capacitive sensor changes due to the airflow blown in by the user along the air passage and the air inlet hole.

[0008] A constant current source is electrically connected to the capacitive sensor and charges the capacitive sensor.

[0009] A timing module, electrically connected to the constant current source, is used to calculate the charging time of the constant current source to obtain a target charging time; wherein the target charging time is determined based on the capacitance value of the capacitive sensor.

[0010] A control module, electrically connected to the timing module and the heating module, is used to determine the status information of the capacitive sensor based on the target charging time and a preset time range, and to control the heating module to start or stop based on the status information.

[0011] The control circuit for electronic cigarettes in this embodiment of the invention has at least the following beneficial effects: the user blows gas into the capacitive sensor through the airway and air inlet hole to change the capacitance value of the capacitive sensor, and a constant current source is set to charge the capacitive sensor. The charging time of the sensor during charging is detected by the timing module to obtain the target charging time. The state information of the capacitive sensor is compared with the target charging time and the preset time range to determine whether the user is blowing or inhaling. The heating module is controlled to start or stop according to the state information of the capacitive sensor, making the control of starting and stopping the electronic cigarette more accurate.

[0012] According to other embodiments of the present invention, in a control circuit for an electronic cigarette, the heating module includes:

[0013] Atomizer core support, wherein the atomizer core support is connected to the fiberglass tube;

[0014] Non-woven fabric, wherein the non-woven fabric is disposed below the atomizing core support;

[0015] A heating wire is disposed between the nonwoven fabrics and is used to start or stop heating according to the control module.

[0016] According to other embodiments of the present invention, the control circuit for an electronic cigarette further includes an indicator module electrically connected to the control module for outputting an indicator signal according to the control signal.

[0017] According to other embodiments of the present invention, a control circuit for an electronic cigarette includes a control module comprising:

[0018] A control unit, electrically connected to the timing module, is used to output a control signal based on a comparison between the target charging time and the preset time range.

[0019] A drive unit, electrically connected to the control unit and the heating module, is used to output a drive signal to the heating module according to the control signal, so as to start or stop the heating module.

[0020] According to other embodiments of the present invention, the control circuit for an electronic cigarette includes a driving unit comprising:

[0021] A second resistor is electrically connected to the control unit;

[0022] The third resistor, one end of which is connected to the power supply;

[0023] The MOS transistor has its gate connected to the other end of the second resistor, its source connected to the power supply, and its drain connected to the third resistor.

[0024] According to other embodiments of the present invention, a control circuit for an electronic cigarette further includes: a voltage regulating component disposed on the top of the housing, the voltage regulating component being used to preset an output voltage value; the circuit further includes:

[0025] An adjustment module, electrically connected to the control module, is used to adjust and determine the output power of the control module based on the output voltage value.

[0026] According to other embodiments of the present invention, in a control circuit for an electronic cigarette, the voltage regulating component includes:

[0027] A pressure regulating knob is located on the top of the housing;

[0028] A voltage regulating plate adjusts the output voltage value according to the scale of the voltage regulating knob.

[0029] The adjustment module of the control circuit for an electronic cigarette according to other embodiments of the present invention includes:

[0030] The fourth resistor has one end connected to the power supply and the other end connected to the control module.

[0031] An adjustable resistor is provided, the adjustable end of which is connected to the fourth resistor and the control module, and is also connected to the voltage regulating board. It is used to adjust the output power of the control module according to the output voltage value of the voltage regulating board, and one end is connected to the control module.

[0032] According to other embodiments of the present invention, a control circuit for an electronic cigarette further includes a charging module, the charging module comprising:

[0033] Power interface;

[0034] A voltage regulator unit, which is electrically connected to the power interface, is used to stabilize the power signal input to the power interface;

[0035] A charging unit, which is electrically connected to the voltage regulator unit, is used to supply power to the control module with the regulated power signal.

[0036] According to other embodiments of the present invention, the control circuit for an electronic cigarette includes a charging unit comprising:

[0037] A constant current source is connected to the capacitive sensor to charge the capacitive sensor;

[0038] A charging chip, wherein the first pin of the charging chip is connected to the control module and the third pin is connected to the constant current source;

[0039] A first capacitor, one end of which is connected to the voltage regulator unit, and the other end is grounded;

[0040] The fifth resistor has one end connected between the first capacitor and ground, and the other end connected to the fifth pin of the charging chip.

[0041] Secondly, one embodiment of the present invention provides an electronic cigarette, the electronic cigarette comprising:

[0042] A control circuit, the control circuit being the control circuit for electronic cigarettes as described in the first aspect;

[0043] The electronic cigarette itself.

[0044] The electronic cigarette of the present invention has at least the following beneficial effects: the control circuit, as described above, makes the start-up and shutdown operations of the electronic cigarette more accurate, reduces accidental start-up and accidental extinguishing, and improves the user experience.

[0045] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0046] Figure 1 This is a module block diagram of a specific embodiment of the control circuit for electronic cigarettes in this invention;

[0047] Figure 2 This is a module block diagram of another specific embodiment of the control circuit for electronic cigarettes in this invention;

[0048] Figure 3 This is a circuit diagram of a specific embodiment of the control circuit for electronic cigarettes in this invention.

[0049] Figure 4 This is a circuit diagram of a specific embodiment of the constant current source in the control circuit of an electronic cigarette according to another embodiment of the present invention;

[0050] Figure 5 This is a schematic diagram of a specific embodiment of the electronic cigarette control circuit used in the present invention.

[0051] Reference numerals: 100, Heating module; 110, Atomizer core bracket; 120, Non-woven fabric; 130, Heating wire; 200, Capacitive sensor; 300, Charging module; 310, Power interface; 320, Voltage regulator unit; 330, Charging unit; 400, Timing module; 500, Control module; 510, Control unit; 520, Drive unit; 530, Constant current source; 600, Indicator module; 700, Adjustment module; 810, Housing; 820, Fiberglass tube; 821, Air passage; 830, Circuit area; 831, Air inlet; 840, Voltage regulating component; 841, Voltage regulating knob; 842, Voltage regulating plate; 850, Drip tip; 860, Main board; 861, Main board sealing silicone; 870, Charging port. Detailed Implementation

[0052] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0053] In the description of this invention, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. If a feature is referred to as "set," "fixed," "connected," or "installed" on another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, connected, or installed on the other feature.

[0054] In the description of the embodiments of the present invention, the term "several" means one or more, and the term "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number, while the terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features, and not as indicating or implying relative importance, the number of indicated technical features, or the order of the indicated technical features.

[0055] Traditional e-cigarettes use capacitive sensors to detect exhalation or inhalation, and then use these sensors to measure the capacitance value, controlling the e-cigarette's activation or deactivation based on this capacitance value. However, directly controlling the e-cigarette's activation or deactivation based on capacitance value is prone to misjudgment, thus affecting the user experience.

[0056] Based on this, this application discloses a control circuit and an electronic cigarette for electronic cigarettes. By providing an airway and an air inlet, the user's breath enters the capacitive sensor along the airway and air inlet, eliminating the need to place the capacitive sensor at the air inlet of the airway, thus preventing a decrease in the sensor's sensing performance. A constant current source charges the capacitive sensor, and a timing module detects the charging time to obtain a target charging time. The target charging time is compared with a preset time range to determine the sensor's state information. Based on this state information, it is determined whether the user is blowing or inhaling. The heating module is then activated or deactivated based on the user's blowing or inhaling action, making the control of the electronic cigarette's activation and deactivation more accurate. Since the target charging time for the capacitive sensor remains constant during normal operation, a decrease or increase in the target charging time to a certain extent determines whether it is blowing or inhaling, making the blowing and inhaling judgment more accurate, and thus controlling the electronic cigarette's activation and deactivation more precisely.

[0057] Reference Figure 1 and Figure 5This diagram illustrates a block diagram of a control circuit for an electronic cigarette according to an embodiment of the present invention. The control circuit for the electronic cigarette is applied to the electronic cigarette, which includes: a housing 810 and a fiberglass tube 820. The housing 810 has a circuit region 830 inside, where the control circuit is housed. The bottom of the housing 810 and the circuit region 830 have air inlet holes 831. The fiberglass tube 820 is located inside the housing 810 and has an air passage 821 that connects to the air inlet hole 831. The control circuit for electronic cigarettes includes: a heating module 100, a capacitive sensor 200, a constant current source 530, a timing module 400, and a control module 500. The heating module 100 is located inside the housing 810 and is connected to a fiberglass tube 820 and communicates with the air passage 821. The capacitive sensor 200 is located in the circuit area 830 of the housing 810 and is used to detect the airflow blown in by the user along the air passage 821 and the air inlet hole 831 to adjust its own capacitance value. A current source 530 is electrically connected to a capacitive sensor 200 and charges the capacitive sensor 200. A timing module 400 is electrically connected to a constant current source 530 and is used to calculate the charging time of the constant current source 530 to obtain a target charging time. The target charging time is determined based on the capacitance value of the capacitive sensor 200. A control module 500 is electrically connected to the timing module 400 and the heating module 100 and is used to control the heating module 100 to start or stop according to the target charging time and a preset time range. Since the user blows gas into the capacitive sensor 200 through the air passage 821 and the air inlet 831, the capacitive sensor 200 is located in the circuit area 830 of the housing 810 to prevent the capacitive sensor 200 from being too close to the air passage 821 inlet, thus preventing a decrease in sensitivity. When the capacitive sensor 200 senses airflow, it changes its capacitance value, and the constant current source 530 charges the capacitive sensor 200. Since the capacitance value of the capacitive sensor 200 changes due to blowing and inhaling operations, the electrical energy that the capacitive sensor 200 can store also changes. Therefore, the timing module 400 detects that the target charging time of the constant current source 530 charging the capacitive sensor 200 will also change. Based on the target charging time and the preset time range, the heating module 100 is controlled to start or stop, making the start or stop control of the electronic cigarette more accurate, rather than directly controlling it based on the capacitance value of the capacitive sensor 200, reducing the situation of accidental start and stop caused by accidental blowing and inhaling operations.

[0058] Please refer to Figure 5 The housing 810 is also provided with a dropper 850, which is connected to the fiberglass tube 820. The dropper 850 has an opening that communicates with the air passage 821, so the user blows gas into the air passage 821 through the dropper 850.

[0059] Please refer to Figure 2In some embodiments, the control module 500 includes a control unit 510 and a drive unit 520. The control unit 510 is electrically connected to the timing module 400 and is used to output a control signal based on a comparison between the target charging time and a preset time range. The drive unit 520 is electrically connected to the control unit 510 and the heating module 100 and is used to output a drive signal to the heating module 100 based on the control signal, so that the heating module 100 is started or turned off.

[0060] It should be noted that when the user inhales, the capacitance value of the capacitive sensor 200 increases, thus increasing the target charging time. If the target charging time exceeds the upper limit of the preset time range, the control unit 510 outputs a first control signal to the drive unit 520. The drive unit 520 then outputs a first drive signal to the heating module 100 based on the first control signal, thereby controlling the heating module 100 to start. When the user exhales, the capacitance value of the capacitive sensor 200 decreases, thus decreasing the target charging time. If the target charging time is less than the lower limit of the preset time range, the control unit 510 outputs a second control signal to the drive unit 520, causing the drive unit 520 to output a second drive signal to the heating module 100 based on the second control signal, thereby controlling the heating module 100 to shut down. Therefore, if the blowing and inhaling operation does not cause the target charging time to exceed the preset time range, that is, if the target charging time does not increase or decrease to a certain percentage, it will be considered that the user has misoperated or that the capacitance value of the capacitive sensor 200 has decreased due to wind. Therefore, the target charging time is still within the preset time range, and the heating module 100 will not be started or stopped. This makes the start-up and stop operation of the electronic cigarette more accurate, reduces accidental start-up and accidental stop-up, and improves the user's experience of using electronic cigarettes.

[0061] In some embodiments, please refer to Figure 5 The heating module 100 includes: an atomizing core support 110, a non-woven fabric 120, and a heating wire 130; the atomizing core support 110 is connected to a fiberglass tube 820; the non-woven fabric 120 is disposed below the atomizing core support 110; the heating wire 130 is disposed between the non-woven fabrics 120 and is used to start or stop heating according to the control module 500. When the heating wire 130 is activated by the first driving signal output by the driving unit 520, it generates heat to heat the e-liquid in the non-woven fabric 120 to produce vapor. The vapor passes through the atomizing core support 110 and enters the air passage 821, making the control of vapor production simple. If the heating wire 130 receives a second driving signal from the driving unit 520, it stops heating and no longer heats the e-liquid in the non-woven fabric 120, thus no longer producing vapor. Therefore, by controlling the opening and closing of the heating wire 130 by the driving unit 520, the generation or extinguishing of e-cigarette vapor can be achieved, making the opening and closing control of the e-cigarette simple.

[0062] In some embodiments, the control circuit for the electronic cigarette further includes an indicator module 600, which is electrically connected to the control module 500 and is used to output an indicator signal according to the control signal. Therefore, by setting the indicator module 600 to output an indicator signal according to the control signal of the control module 500, the user can clearly see the on / off state of the electronic cigarette according to the indicator signal, thereby improving the user experience.

[0063] In some embodiments, the electronic cigarette further includes: a voltage regulating component 840, which is disposed on the top of the housing 810 and is used to preset an output voltage value; the circuit also includes: an adjustment module 700, which is electrically connected to the control module 500 and is used to adjust the output power of the control module 500 according to the output pressure value. Therefore, by setting the preset output pressure value of the voltage regulating component 840, the adjustment module 700 can adjust the output power of the control module 500 according to the output pressure value, so as to realize the automatic control of the heating degree of the heating module 100 and improve the user's experience.

[0064] Please refer to Figure 5 The pressure regulating assembly 840 includes: a pressure regulating knob 841 and a pressure regulating plate 842; the pressure regulating knob 841 is located on the top of the housing 810; the pressure regulating plate 842 adjusts the output pressure value according to the scale of the rotation of the pressure regulating knob 841. The pressure regulating knob 841 is also provided with a contact element (not shown in the figure) that abuts against the pressure regulating plate 842. When the pressure regulating knob 841 is rotated, the contact element rotates simultaneously to abut against the pressure regulating plate 842. The pressure regulating plate 842 is located inside the housing 810 and connected to the contact element of the pressure regulating knob 841. The rotation of the pressure regulating knob 841 drives the contact element to rotate, and the rotating contact element presses against the pressure regulating plate 842, causing the output pressure value of the pressure regulating plate 842 to change. The regulating module 700 adjusts its own resistance value according to the output pressure value to regulate the output power of the control module 500, making the output power adjustment of the control module 500 easy.

[0065] Please refer to Figure 2 and Figure 3 In some embodiments, the control unit 510 is the main controller U1; the indicator module 600 includes a first resistor R1 and an indicator LED. The first resistor R1 is electrically connected to the control unit 510, and one end of the indicator LED is connected to a power supply while the other end is connected to the first resistor R1. When the main controller U1 outputs a first control signal at a low level, the indicator LED is turned on and illuminated. When the main controller U1 outputs a second control signal at a high level, the indicator LED is turned off. Therefore, by setting the indicator LED as an indication for the main controller U1 to control the heating module 100 to start or stop, the user experience is improved.

[0066] In some embodiments, the driving unit 520 includes: a second resistor R2, a third resistor R3, and a MOSFET Q1; the second resistor R2 is electrically connected to the control unit 510; one end of the third resistor R3 is connected to a power supply; the gate of the MOSFET Q1 is connected to the other end of the second resistor R2, the source is connected to a power supply, and the drain is connected to the third resistor R3. The MOSFET Q1 is a P-channel MOSFET. The control unit 510 is the main controller U1. When the target charging time exceeds the upper limit of a preset time range, the main controller U1 outputs a first control signal at a low level, and the main controller U1 outputs a low level to the MOSFET Q1, turning on the MOSFET Q1. Then, the heating module 100 is connected to a high level and ignition begins. If the target charging time is less than the lower limit of the preset time range, the main controller U1 outputs a second control signal at a high level, turning off the MOSFET Q1 after it reaches a high level, and the heating module 100 stops working after it reaches a low level. Therefore, by connecting the MOSFET Q1 to the main controller U1, the on / off control of the heating module 100 is made more stable based on the high or low level output of the main controller U1.

[0067] In some embodiments, the adjustment module 700 includes a fourth resistor R4 and an adjustable resistor VR1; one end of the fourth resistor R4 is connected to a power supply, and the other end is connected to the control module 500; the adjustable end of the adjustable resistor VR1 is connected to the fourth resistor R4 and the control module 500, and the other end is connected to the control module 500. By adjusting its resistance value according to the output pressure value of the voltage plate, the timing module 400 adjusts the output power of the control module 500 according to the resistance value of the adjustable resistor VR1, making the output power adjustment easy and thus simplifying the adjustment of the inhalation intensity when starting the electronic cigarette.

[0068] Please refer to Figure 2 and Figure 4 In some embodiments, the control circuit for the electronic cigarette further includes a charging module 300, which includes a power interface 310, a voltage regulator unit 320, and a charging unit 330. The voltage regulator unit 320 is electrically connected to the power interface 310 and is used to stabilize the power signal input to the power interface 310. The charging unit 330 is electrically connected to the voltage regulator unit 320 and is used to supply power to the control module 500 with the regulated power signal. By setting the power interface 310 to charge, the power voltage is stabilized by the voltage regulator unit 320 and then input to the control module 500 through the charging unit 330 to provide power to the control module 500, enabling the control module 500 to operate normally.

[0069] In some embodiments, the voltage regulator unit 320 includes a sixth resistor R6, a seventh resistor R7, and a second capacitor C2. One end of the sixth resistor R6 is connected to the power interface 310 and the charging unit 330, and the other end is connected to one end of the seventh resistor R7, the other end of which is grounded. One end of the second capacitor C2 is connected between the sixth resistor R6 and the seventh resistor R7, and the other end is grounded. Therefore, the voltage regulator unit 320, composed of the sixth resistor R6, the seventh resistor R7, and the second capacitor C2, ensures that the power supply voltage is regulated before output, thereby guaranteeing the stable operation of the control module 500.

[0070] In some embodiments, the charging unit 330 includes: a charging chip U2, a first capacitor C1, and a fifth resistor R5; a first pin of the charging chip U2 is connected to the control module 500, and a third pin is connected to the constant current source 530; one end of the first capacitor C1 is connected to the voltage regulator unit 320, and the other end is grounded; one end of the fifth resistor R5 is connected between the first capacitor C1 and ground, and the other end is connected to the fifth pin of the charging chip U2. By setting the first capacitor C1, the charging chip U2, and the fifth resistor R5 to form the charging unit 330, the charging operation of the control module 500 is realized. By charging the control module 500, the constant current source 530 in the control module 500 stores electrical energy, so that the constant current source 530 can charge the capacitive sensor 200.

[0071] Please refer to Figure 5 In some embodiments, a motherboard 860 is installed in the circuit area 830 inside the housing 810, and a capacitive sensor 200 is installed on the motherboard 860. The charging module 300, control module 500, timing module 400, and adjustment module 700 are also installed on the motherboard 860. The motherboard 860 is connected to a charging chip U2, and a motherboard sealing silicone 861 is provided between the motherboard 860 and the charging chip U2 to seal and isolate the charging chip U2 and the motherboard 860. A charging port 870 is provided at the bottom of the housing 810, and the charging port 870 is connected to the power interface 310. The charging port 870 can be any one of Type-C, Micro USB, or Lightning charging port, and there is no specific limitation on the type of charging port 870.

[0072] In addition, this application also discloses an electronic cigarette, which includes a control circuit and an electronic cigarette body. The control circuit is as described above for electronic cigarettes, which makes the start-up and shutdown operations of the electronic cigarette more accurate, reduces accidental start-up and accidental extinguishing, and improves the user experience.

[0073] The following is for reference. Figures 1 to 5 A control circuit for an electronic cigarette according to an embodiment of the present invention is described in detail with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the invention in any specific way.

[0074] The power supply voltage is input through the power interface 310 to the voltage regulator unit 320 for voltage regulation. Then, the charging unit 330 charges the main controller U1 according to the regulated power supply voltage, and the timing module 400 monitors the charging time of the capacitive sensor 200 to obtain the target charging time. When the user inhales, the gas enters the capacitive sensor 200 along the air passage 821 and the air inlet hole 831, which increases the capacitance value of the capacitive sensor 200. This increases the charging time of the capacitive sensor 200 by the constant current source 530, thus increasing the target charging time. If the target charging time exceeds the upper limit of the preset time range, the main controller U1 outputs a low level to the indicator LED and the MOS transistor Q1. After the MOS transistor Q1 is turned on, it controls the heating wire 130 to start. The heating wire 130 generates heat to heat the e-liquid in the non-woven fabric 120 to produce smoke. The smoke enters the atomizer through the atomizer core bracket 110 and then enters the air passage 821. The user can inhale the smoke through the drip tip 850. Simultaneously, the indicator LED illuminates to ensure accurate start-up of the electronic cigarette. When the user exhales, the capacitance of the capacitive sensor 200 decreases, shortening the charging time of the constant current source 530. If the target charging time falls below the lower limit of the preset range, the main controller U1 outputs a high level to the MOSFET Q1 and the indicator LED. This causes the MOSFET Q1 to turn off, controlling the heating wire 130 to shut down. The heating wire 130 no longer heats the e-liquid in the non-woven fabric 120, thus ceasing vapor production. The indicator LED also turns off, ensuring accurate shut-off of the electronic cigarette, reducing accidental shutdowns, and improving the user experience.

[0075] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0076] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0077] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A control circuit for electronic cigarettes, characterized in that, An application is made in electronic cigarettes, the electronic cigarette comprising: a housing and a fiberglass tube, the housing having an internal circuit area housing the control circuit, the bottom of the housing and the circuit area having an air inlet, the fiberglass tube being disposed within the housing and having an air passage communicating with the air inlet, the control circuit comprising: A heating module is disposed inside the housing and is connected to the fiberglass tube and communicates with the air passage; A capacitive sensor is disposed in the circuit area of ​​the housing, and the capacitance value of the capacitive sensor changes due to the airflow blown in by the user along the air passage and the air inlet hole. A constant current source is electrically connected to the capacitive sensor and charges the capacitive sensor. A timing module, electrically connected to the constant current source, is used to calculate the charging time of the constant current source to obtain a target charging time; wherein the target charging time is determined based on the capacitance value of the capacitive sensor. A control module, electrically connected to the timing module and the heating module, is used to determine the status information of the capacitive sensor based on the target charging time and a preset time range, and to control the heating module to start or stop based on the status information; wherein the status information is a blowing state or an inhaling state; The charging module includes: Power interface; A voltage regulator unit, which is electrically connected to the power interface, is used to stabilize the power signal input to the power interface; A charging unit, which is electrically connected to the voltage regulator unit, is used to supply power to the control module with the regulated power signal; The circuit area inside the housing is provided with a motherboard, the capacitive sensor is provided on the motherboard, and the charging module, the control module and the timing module are provided on the motherboard.

2. The control circuit for electronic cigarettes according to claim 1, characterized in that, The heating module includes: Atomizer core support, wherein the atomizer core support is connected to the fiberglass tube; Non-woven fabric, wherein the non-woven fabric is disposed below the atomizing core support; A heating wire is disposed between the nonwoven fabrics and is used to start or stop heating according to the control module.

3. The control circuit for electronic cigarettes according to claim 1, characterized in that, The control module includes: A control unit, electrically connected to the timing module, is used to output a control signal based on a comparison between the target charging time and the preset time range. A drive unit, electrically connected to the control unit and the heating module, is used to output a drive signal to the heating module according to the control signal, so as to start or stop the heating module.

4. The control circuit for electronic cigarettes according to claim 3, characterized in that, The driving unit includes: A second resistor is electrically connected to the control unit; The third resistor, one end of which is connected to the power supply; The MOS transistor has its gate connected to the other end of the second resistor, its source connected to the power supply, and its drain connected to the third resistor.

5. The control circuit for electronic cigarettes according to claim 1, characterized in that, The electronic cigarette further includes: a voltage regulating component, which is disposed on the top of the housing and is used to preset the output voltage value; the circuit further includes: An adjustment module, electrically connected to the control module, is used to adjust and determine the output power of the control module based on the output voltage value.

6. The control circuit for electronic cigarettes according to claim 5, characterized in that, The voltage regulating component includes: A pressure regulating knob is located on the top of the housing; A voltage regulating plate adjusts the output voltage value according to the scale of the voltage regulating knob.

7. The control circuit for electronic cigarettes according to claim 6, characterized in that, The adjustment module includes: The fourth resistor has one end connected to the power supply and the other end connected to the control module. An adjustable resistor is provided, the adjustable end of which is connected to the fourth resistor and the control module, and is also connected to the voltage regulating board. It is used to adjust the output power of the control module according to the output voltage value of the voltage regulating board, and one end is connected to the control module.

8. The control circuit for electronic cigarettes according to claim 7, characterized in that, The charging unit includes: A charging chip, wherein the first and third pins of the charging chip are connected to the control module; A first capacitor, one end of which is connected to the voltage regulator unit, and the other end is grounded; The fifth resistor has one end connected between the first capacitor and ground, and the other end connected to the fifth pin of the charging chip.

9. An electronic cigarette, characterized in that, The electronic cigarette includes: Control circuit, the control circuit being a control circuit for electronic cigarettes as described in any one of claims 1 to 8; The electronic cigarette itself.

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