Double-cartridge control circuit and electronic cigarette

Abstract

The invention relates to the technical field of electronic cigarette devices, in particular to a double-cartridge control circuit and an electronic cigarette, the double-cartridge control circuit is connected with an electronic cigarette atomizer, and the double-cartridge control circuit comprises an airflow detection module, an atomization control module, a micro-control module and a duty ratio module; wherein the airflow detection module generates a smoking state signal; the atomization control module controls the working state of the electronic cigarette atomizer according to the smoking state signal and generates a working state signal; the micro-control module is used for identifying the working state of the electronic cigarette atomizer, detecting the working state signal when the electronic cigarette atomizer is in a working state, and generating a duty ratio control signal according to the magnitude of the working state signal; and the duty ratio module is used for controlling the working power of the electronic cigarette atomizer according to the size of the duty ratio control signal, so that I / O serial port resources consumed by the double-cartridge control circuit are reduced, and the production cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cigarette devices, and particularly to a dual-cartridge control circuit and an electronic cigarette. Background Art

[0002] With the gradual development of the electronic cigarette industry, electronic cigarettes with dual cartridges have emerged on the market. The dual-cartridge electronic cigarette has a dual-channel structure inside, with two cartridge passages provided, and electronic cigarette atomizers are respectively arranged in the cartridge passages. In the existing technology of electronic cigarettes, a smoking state signal at an airflow sensor needs to be detected through an I / O serial port of a main control chip in one cartridge passage to identify whether the user is smoking. When the user is smoking, the main control chip detects the working state of the electronic cigarette atomizer through another I / O serial port, and controls the working state of the electronic cigarette atomizer through another I / O serial port. This makes the dual-cartridge electronic cigarette need to additionally occupy multiple I / O serial ports for detection and control, and it is necessary to replace the MCU model to meet the I / O serial port resource requirements, thereby increasing the production cost.

[0003] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0004] In view of the above deficiencies in the existing technology, the purpose of the present invention is to provide a dual-cartridge control circuit and an electronic cigarette to solve the technical problem that the dual-cartridge electronic cigarette needs to additionally increase multiple I / O serial ports, resulting in an increase in cost.

[0005] The technical solution of the present invention is as follows: A dual-cartridge control circuit, connected to an electronic cigarette atomizer, includes: an airflow detection module, an atomization control module, a micro-control module, and a duty cycle module; wherein, The airflow detection module is used to detect the gas flow rate and generate a smoking state signal; The atomization control module is connected to the airflow detection module, and is used to be connected to the electronic cigarette atomizer and control the working state of the electronic cigarette atomizer according to the smoking state signal. The working state includes a working state or a working stop state, and generates a working state signal when the electronic cigarette atomizer is in the working state; The first detection end of the micro-control module is connected to the duty cycle module, and is connected to the atomization control module through the electronic cigarette atomizer. The first control end of the micro-control module is connected to the duty cycle module. The first detection end of the micro-control module is used to identify the working state of the electronic cigarette atomizer, and detect the working state signal when the electronic cigarette atomizer is in the working state; the first control end of the micro-control module generates a duty cycle control signal according to the magnitude of the working state signal when the electronic cigarette atomizer is working; One end of the duty cycle module is connected to the power supply voltage, and the other end of the duty cycle module is connected to the atomization control module. The duty cycle module is used to collect the duty cycle signal and control the working power of the electronic cigarette atomizer according to the magnitude of the duty cycle control signal.

[0006] A further setting of the present invention further includes a transient suppression module, which is connected to the common connection end of the duty cycle module and the atomization control module and is used to suppress transient voltage.

[0007] A further setting of the present invention, the air flow detection module includes: a first air flow detection unit and a second air flow detection unit; the first air flow detection unit and the second air flow detection unit are respectively connected to the atomization control module; The first air flow detection unit includes: a first resistor, a first capacitor, a first air flow detection chip and a first air flow sensor. One end of the first resistor is connected to the power supply voltage, and the other end of the first resistor is connected to the power supply voltage terminal of the first air flow detection chip. One end of the first capacitor is connected to the common connection end of the first resistor and the first air flow detection chip, and the other end of the first capacitor is grounded; the input end of the first air flow detection chip is connected to one end of the first air flow sensor, and the output end of the first air flow detection chip is connected to the atomization control module; the other end of the first air flow sensor is grounded to the grounding terminal of the first air flow detection chip; The second air flow detection unit includes: a second resistor, a second capacitor, a second air flow detection chip and a second air flow sensor. One end of the second resistor is connected to the power supply voltage, and the other end of the second resistor is connected to the power supply voltage terminal of the second air flow detection chip. One end of the second capacitor is connected to the common connection end of the second resistor and the second air flow detection chip, and the other end of the second capacitor is grounded; the input end of the second air flow detection chip is connected to one end of the second air flow sensor, and the output end of the second air flow detection chip is connected to the atomization control module; the other end of the second air flow sensor is grounded to the grounding terminal of the second air flow detection chip.

[0008] A further setting of the present invention, the atomization control module includes a first atomization control unit and a second atomization control unit, and the electronic cigarette atomizer includes a first electronic cigarette atomizer and a second electronic cigarette atomizer; the first atomization control unit is respectively connected to the first air flow detection unit and the first electronic cigarette atomizer, and the second atomization control unit is respectively connected to the second air flow detection unit and the second electronic cigarette atomizer; The first atomization control unit includes: a third resistor, a fourth resistor, and a first field-effect transistor; one end of the third resistor is connected to the first airflow detection unit, the other end of the third resistor is connected to the gate of the first field-effect transistor, the drain of the first field-effect transistor is connected to the first electronic cigarette atomizer, the source of the first field-effect transistor is grounded, one end of the fourth resistor is connected to the gate of the first field-effect transistor, and the other end of the fourth resistor is connected to the source of the first field-effect transistor; The second atomization control unit includes: a fifth resistor, a sixth resistor, and a second field-effect transistor; one end of the fifth resistor is connected to the second airflow detection unit, the other end of the fifth resistor is connected to the gate of the second field-effect transistor, the drain of the second field-effect transistor is connected to the second electronic cigarette atomizer, the source of the second field-effect transistor is grounded, one end of the fourth resistor is connected to the gate of the second field-effect transistor, and the other end of the fourth resistor is connected to the source of the second field-effect transistor.

[0009] A further setting of the present invention is that the micro-control module includes a main control chip. The main control chip's first detection end is connected to the common connection end of the atomization control module and the duty cycle module, for identifying the working state of the electronic cigarette atomizer and detecting the working state signal when the electronic cigarette atomizer is in the working state; the main control chip's first control end is connected to the duty cycle module, and generates a duty cycle control signal according to the magnitude of the working state signal when the electronic cigarette atomizer is in the working state.

[0010] A further setting of the present invention is that the duty cycle module includes: a third field-effect transistor, a seventh resistor, and an eighth resistor; the source of the third field-effect transistor is connected to the power supply voltage, the gate of the third field-effect transistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to the micro-control module, and the drain of the third field-effect transistor is connected to the atomization control module; one end of the seventh resistor is connected to the source of the third field-effect transistor, and the other end of the seventh resistor is connected to the gate of the third field-effect transistor.

[0011] A further setting of the present invention is that the atomization control module further includes a ninth resistor. One end of the ninth resistor is connected to the power supply voltage, and the other end of the ninth resistor is connected to the first detection end of the micro-control module and the common connection end of the duty cycle module.

[0012] A further setting of the present invention is that the first field-effect transistor or the second field-effect transistor is an N-channel field-effect transistor.

[0013] A further arrangement of the present invention is that the transient suppression module includes a bidirectional clamping diode. One end of the bidirectional clamping diode is connected to the common connection end of the atomization control module and the duty ratio module, and the other end of the bidirectional clamping diode is grounded.

[0014] Based on the same inventive concept, the present invention also discloses an electronic cigarette, which includes an electronic cigarette atomizer, a battery module, and the dual-cartridge control circuit as described above. The electronic cigarette atomizer is connected to the atomization control module, and the battery module is connected to the duty ratio module. The battery module is used to supply power to the dual-cartridge control circuit.

[0015] A dual-cartridge control circuit and an electronic cigarette provided by the present invention. The dual-cartridge control circuit is connected to an electronic cigarette atomizer and includes an air flow detection module, an atomization control module, a micro-control module, and a duty ratio module. Among them, the air flow detection module is used to detect the gas flow rate and generate a smoking state signal; the atomization control module is connected to the air flow detection module and is used to be connected to the electronic cigarette atomizer and control the working state of the electronic cigarette atomizer according to the smoking state signal. The working state includes a working state or a working stop state, and a working state signal is generated when the electronic cigarette atomizer is in the working state; the first detection end of the micro-control module is connected to the duty ratio module and is connected to the atomization control module through the electronic cigarette atomizer. The first control end of the micro-control module is connected to the duty ratio module. The first detection end of the micro-control module is used to identify the working state of the electronic cigarette atomizer and detect the working state signal when the electronic cigarette atomizer is in the working state; the first control end of the micro-control module generates a duty ratio control signal according to the magnitude of the working state signal when the electronic cigarette atomizer is working; one end of the duty ratio module is connected to the power supply voltage, and the other end of the duty ratio module is connected to the electronic cigarette atomizer. It is used to collect the duty ratio signal and control the working power of the electronic cigarette atomizer according to the magnitude of the duty ratio control signal. By reusing the I / O serial port of the micro-control module in the circuit, the present invention enables it to identify the working state of the electronic cigarette atomizer, and determines whether the user is smoking by identifying the working state of the electronic cigarette atomizer. And when the electronic cigarette atomizer is in the working state, it is reused to detect the magnitude of the working state signal, reducing the I / O serial port resources required by the dual-cartridge control circuit and effectively reducing the production cost. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0017] Figure 1 It is a structural block diagram of a dual cartridge control circuit in some preferred embodiments of the present invention.

[0018] Figure 2 It is a structural block diagram of a dual cartridge control circuit in a further implementation manner of some preferred embodiments of the present invention.

[0019] Figure 3 It is a circuit schematic diagram of a duty cycle module for one of the cartridge paths in the prior art.

[0020] Figure 4 It is a circuit schematic diagram of a duty cycle module for the other cartridge path in the prior art.

[0021] Figure 5 It is a circuit schematic diagram of a micro control module in the prior art.

[0022] Figure 6 It is a circuit schematic diagram of an air flow detection module in the present invention.

[0023] Figure 7 It is a circuit schematic diagram of an atomization control module and a duty cycle module in the present invention.

[0024] Figure 8 It is a circuit schematic diagram of a micro control module in the present invention.

[0025] Marks in the attached drawings: 10, air flow detection module; 11, first air flow detection unit; 12, second air flow detection unit; 20, atomization control module; 21, first atomization control unit; 22, second atomization control unit; 30, micro control module; 40, duty cycle module; 50, transient suppression module. Detailed implementation manners

[0026] The present invention provides a dual cartridge control circuit and an electronic cigarette. To make the purpose, technical solution and effects of the present invention clearer and more definite, the following further elaborates on the present invention with reference to the attached drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] In the embodiments and the scope of the patent application, unless otherwise specifically defined in the text for articles, "a", "an", "the" and "said" may also include the plural form. If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature.

[0028] It should be further understood that the term "comprising" used in the description of the present invention means the presence of the stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used here may include wireless connection or wireless coupling. The phrase "and / or" used here includes all or any unit and all combinations of one or more of the associated listed items.

[0029] Those skilled in the art of the present technology can understand that unless otherwise defined, all terms used here (including technical terms and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the field to which the present invention pertains. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0030] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] In the prior art, the dual-cartridge control circuit inside a dual-cartridge electronic cigarette is as Figures 3 to 6 shown.

[0032] Through research by the inventor, it is found that as e-cigarette products gradually tend to be diversified, e-cigarettes with dual cartridges have emerged on the market. The interior of this dual-cartridge e-cigarette is a dual-channel structure, with two cartridge passages provided, and an e-cigarette atomizer and an airflow detection module 10 are respectively arranged in the cartridge passages. The airflow detection module 10 at least includes an airflow sensor, and the airflow sensor is used to detect the negative pressure generated when the user smokes. One cartridge is independently controlled by one e-cigarette atomizer and one airflow detection module 10, and the other cartridge is controlled by another e-cigarette atomizer and another airflow detection module 10. Cartridges with different flavored e-liquids can be set in different cartridge passages, so that the user can freely switch the suction flavor through a switch during use. Exemplarily, the switch can be a mechanical switch or an electronic switch. The e-cigarette atomizers are respectively arranged in the two cartridge passages of the e-cigarette. The e-cigarette atomizer can be regarded as a heating component, which is powered by a battery to generate heat to evaporate the e-liquid in the corresponding cartridge to form smoke. The e-cigarette simulates the effect similar to smoking by controlling the heating power of the atomizer. The dual-cartridge control circuit needs to support the output of two e-cigarette atomizers, and during the use of the e-cigarette, one of the cartridge passages is selected through the switch control, and the operation of the e-cigarette atomizer in the other cartridge passage is stopped to realize the switching of the cartridge passages. In order to detect and control the working state of the e-cigarette atomizer at the current moment when any one of the cartridge passages is conducted, it is necessary to detect and control the working states of the e-cigarette atomizers in the two cartridge passages respectively, and then additional multiple I / O serial port resources are occupied on the basis of the existing circuit to realize the detection and control of the working state of the second e-cigarette atomizer.

[0033] Specifically, please refer to Figure 5 and Figure 6 simultaneously. The first airflow sensor MIC1 and the second airflow sensor MIC2 are respectively distributed in the two cartridge passages. The first airflow sensor MIC1 is connected to the first airflow detection chip U1, and the output end of the first airflow detection chip U1 is connected to the main control chip U0. The second airflow sensor MIC2 is connected to the second airflow detection chip U2, and the output end of the second airflow detection chip U2 is connected to the main control chip U0. When the user switches through the switch, the first airflow sensor MIC1 or the second airflow sensor MIC2 in the corresponding cartridge passage detects the airflow flowing through, and when the airflow velocity is greater than a predetermined value, it is determined that the user is smoking, and a smoking state signal is output according to the determination result. The main control chip U0 uses the detected smoking state signal as the smoking state signal, and then knows whether the user is smoking by receiving the smoking state signal, and then selects to turn on or off the e-cigarette atomizer.

[0034] Furthermore, in the prior art, the circuit schematic diagrams of the atomization control modules in the two cartridge passages are as shown in Figure 3 and Figure 4As shown. Exemplarily, Figure 3 is used as an example to illustrate the electronic atomizer and the atomization control module 20 in the cartridge passage. The source of the field effect transistor Q01 is connected to the power supply voltage B+. The gate of the field effect transistor Q01 is connected to the first control terminal PWM CON1 of the main control chip U0 through the second atomization resistor R02. One end of the first atomization resistor R01 is connected to the source of the field effect transistor Q01, and the other end of the first atomization resistor R01 is connected to the gate of the field effect transistor Q01. The drain of the field effect transistor Q01 is connected to one end of the electronic atomizer through the positive electrode pad H+1, and the other end of the electronic atomizer is grounded through the first negative electrode pad H-1. The first detection terminal ADC1 of the main control chip U0 is connected to the drain of the field effect transistor Q01. When the user is smoking, the main control chip U0 detects the working state signal of the electronic atomizer in the working state through the first detection terminal ADC1, and generates a duty cycle control signal through the first control terminal PWM CON1 of the main control chip U0 according to the magnitude of the working state signal to control the working power of the electronic atomizer. The connection relationship between the electronic atomizer and the atomization control module 20 in another cartridge passage in the dual-cartridge control circuit is as Figure 4 shown, and its working mode is the same as that of the aforementioned atomization control module 20, which will not be elaborated here. It can be seen that in order to realize the control of the dual-cartridge electronic cigarette, each cartridge passage needs an I / O serial port to detect the gas flow rate, which is used to identify the user's smoking signal, an I / O serial port to control the working state of the electronic atomizer, and an I / O serial port to identify the voltage when the electronic atomizer is in the working state. The main control chip U3 in the dual-cartridge control circuit needs no less than 6 I / O serial ports to realize the dual-cartridge control function. Therefore, in order to meet the I / O serial port resource requirements of the dual-cartridge control circuit, it is necessary to select the main control chip U3 signal with more I / O serial ports, thereby increasing the cost of the production process.

[0035] In view of the above technical problems, the structural block diagram of some preferred embodiments of a dual-cartridge control circuit provided by the present invention is as Figure 1As shown, the dual cartridge control circuit is connected to an electronic cigarette atomizer (not shown in the figure), and it includes: an air flow detection module 10, an atomization control module 20, a micro control module 30, and a duty cycle module 40; wherein, the air flow detection module 10 is used to detect the gas flow rate and generate a smoking state signal; the atomization control module 20 is connected to the air flow detection module 10, and is used to be connected to the electronic cigarette atomizer and control the working state of the electronic cigarette atomizer according to the smoking state signal, the working state including a working state or a working stop state, and generating a working state signal when the electronic cigarette atomizer is in the working state; the first detection end of the micro control module 30 is connected to the duty cycle module 40, and is connected to the atomization control module 20 through the electronic cigarette atomizer, the first control end of the micro control module 30 is connected to the duty cycle module 40, the first detection end of the micro control module 30 is used to identify the working state of the electronic cigarette atomizer, and detect the working state signal when the electronic cigarette atomizer is in the working state; the first control end of the micro control module 30 generates a duty cycle control signal according to the magnitude of the working state signal when the electronic cigarette atomizer is working; one end of the duty cycle module 40 is connected to the power supply voltage B+, the other end of the duty cycle module 40 is connected to the atomization control module 20, and the duty cycle module is used to collect the duty cycle signal and control the working power of the electronic cigarette atomizer according to the magnitude of the duty cycle control signal.

[0036] Specifically, when the user uses a dual-cartridge electronic cigarette, the airflow detection module 10 detects that there is gas flowing through the cartridge passage and generates a smoking state signal according to the magnitude of the gas flow rate. When the magnitude of the gas flow rate reaches a predetermined value, or when gas flow is detected, the airflow detection module 10 indicates that the user is smoking through the smoking state signal. The atomization control module 20 receives the smoking state signal and controls the working state of the electronic cigarette atomizer according to the smoking state signal. When the electronic cigarette atomizer is working, it will divide the power supply voltage B+ connected to the duty ratio module 40 through the atomization control module 20. Therefore, the working state in the atomization control module 20 can be detected through the first detection terminal ADC2 of the micro control module 30, and it can be identified whether the working state of the electronic cigarette atomizer is in the working state or the working stop state, indirectly identifying whether the user's smoking state is smoking or stopped smoking. Exemplarily, the parameter for characterizing the working state is the voltage value in the atomization control module 20. When the electronic cigarette atomizer is in the working state, the user is smoking; when the electronic cigarette atomizer is in the working stop state, the user stops smoking. When the user is in the smoking state, the first detection terminal ADC2 of the micro control module 30 is reused to detect the working state signal when the electronic cigarette atomizer is in the working state. Since the internal resistance of the electronic cigarette atomizer is predetermined, the micro control module 30 generates a duty ratio control signal according to the magnitude of the working state signal, and can control the voltage value input to the electronic cigarette atomizer to control the working power of the electronic cigarette atomizer. Thus, the smoking state detection and power control of the dual-cartridge control circuit can be realized through the two IO ports of the first detection terminal ADC2 and the first control terminal PWM CON1 of the micro control module 30.

[0037] Further, please refer to Figure 1 and Figure 7 together. In a further implementation manner of some preferred embodiments of the present invention, the dual-cartridge control circuit further includes a transient suppression module 50. The transient suppression module 50 is connected to the common connection end of the duty ratio module 40 and the atomization control module 20 for suppressing transient voltage. The transient suppression module 50 includes a bidirectional clamping diode DR1. One end of the bidirectional clamping diode DR1 is connected to the common connection end of the atomization control module 20 and the duty ratio module 40, and the other end of the bidirectional clamping diode DR1 is grounded. The bidirectional clamping diode DR1 can be any one of a bidirectional transient voltage suppression diode, a bidirectional Zener diode, and a Schottky diode, and is used to suppress instantaneous voltage spikes and reduce the loss of components caused by spike voltage during the power-on process.

[0038] Further, please refer to Figure 1 、 Figure 2 and Figure 6, the airflow detection module 10 includes: a first airflow detection unit 11 and a second airflow detection unit 12; the first airflow detection unit 11 and the second airflow detection unit 12 are respectively connected to the atomization control module 20; the first airflow detection unit 11 includes: a first resistor R1, a first capacitor C1, a first airflow detection chip U1 and a first airflow sensor MIC1. One end of the first resistor R1 is connected to the power supply voltage B+, the other end of the first resistor R1 is connected to the power supply voltage terminal VDD of the first airflow detection chip U1, one end of the first capacitor C1 is connected to the common connection end of the first resistor R1 and the first airflow detection chip U1, and the other end of the first capacitor C1 is grounded; the input end of the first airflow detection chip U1 is connected to one end of the first airflow sensor MIC1, the output end OUT of the first airflow detection chip U1 is connected to the atomization control module 20; the other end of the first airflow sensor MIC1 is grounded to the ground terminal GND of the first airflow detection chip U1; the second airflow detection unit 12 includes: a second resistor R2, a second capacitor C2, a second airflow detection chip U2 and a second airflow sensor MIC2. One end of the second resistor R2 is connected to the power supply voltage B+, the other end of the second resistor R2 is connected to the power supply voltage terminal VDD of the second airflow detection chip U2, one end of the second capacitor C2 is connected to the common connection end of the second resistor R2 and the second airflow detection chip U2, and the other end of the second capacitor C2 is grounded; the input end of the second airflow detection chip U2 is connected to one end of the second airflow sensor MIC2, the output end OUT of the second airflow detection chip U2 is connected to the atomization control module 20; the other end of the second airflow sensor MIC2 is grounded to the ground terminal GND of the second airflow detection chip U2.

[0039] Specifically, the first airflow detection unit 11 is as Figure 6 shown in the above figure, and the second airflow detection unit 12 is as Figure 6As shown in the figure below, the first airflow sensor MIC1 and the second airflow sensor MIC2 can be silicon microphone airflow sensors or electret airflow sensors. Exemplarily, in some preferred embodiments of the present invention, the first airflow sensor MIC1 and the second airflow sensor MIC2 are MSPC01-GDLS19 silicon microphone airflow sensors. The inside of the first airflow sensor MIC1 or the second airflow sensor MIC2 can be equivalently regarded as a parallel plate capacitor. When the user inhales through the cartridge passage of the electronic cigarette, the negative pressure generated by the gas flow rate causes the internal capacitance to change. The capacitance change value is recognized and processed by the first airflow sensor MIC1 or the second airflow sensor MIC2 and then output as a continuous electrical signal. Exemplarily, in the present invention, the continuous electrical signal is the effective capacitance value in the first airflow sensor MIC1 or the second airflow sensor MIC2. The models of the first airflow detection chip U1 and the second airflow detection chip U2 are BM9087. The input terminal of the first airflow detection chip U1 is the third pin SW of the first airflow detection chip U1, and the input terminal of the second airflow detection chip U2 is the third pin SW of the second airflow detection chip U2. When the first airflow detection chip U1 or the second airflow detection chip U2 detects a change in the effective capacitance value in the first airflow sensor MIC1 or the second airflow sensor MIC2, the level at the output terminal OUT of the first airflow detection chip U1 or the output terminal OUT of the second airflow detection chip U2 flips from the default low level state after power-on to a high level, thereby converting the detected gas flow rate into a smoking state signal.

[0040] Further, please refer to Figure 6 and Figure 7, the atomization control module 20 includes a first atomization control unit 21 and a second atomization control unit 22, and the electronic cigarette atomizer includes a first electronic cigarette atomizer and a second electronic cigarette atomizer; the first atomization control unit 21 is respectively connected to the first air flow detection unit 11 and the first electronic cigarette atomizer, and the second atomization control unit 22 is respectively connected to the second air flow detection unit 12 and the second electronic cigarette atomizer; the first atomization control unit 21 includes: a third resistor R3, a fourth resistor R4, and a first field effect transistor Q1; one end of the third resistor R3 is connected to the first air flow detection unit 11, the other end of the third resistor R3 is connected to the gate of the first field effect transistor Q1, the drain of the first field effect transistor Q1 is connected to the first electronic cigarette atomizer, the source of the first field effect transistor Q1 is grounded, one end of the fourth resistor R4 is connected to the gate of the first field effect transistor Q1, and the other end of the fourth resistor R4 is connected to the source of the first field effect transistor Q1; the second atomization control unit 22 includes: a fifth resistor R5, a sixth resistor R6, and a second field effect transistor Q2; one end of the fifth resistor R5 is connected to the second air flow detection unit 12, the other end of the fifth resistor R5 is connected to the gate of the second field effect transistor Q2, the drain of the second field effect transistor Q2 is connected to the second electronic cigarette atomizer, the source of the second field effect transistor Q2 is grounded, one end of the fourth resistor R4 is connected to the gate of the second field effect transistor Q2, and the other end of the fourth resistor R4 is connected to the source of the second field effect transistor Q2. The atomization control module 20 further includes a ninth resistor R9, one end of the ninth resistor R9 is connected to the power supply voltage B+, and the other end of the ninth resistor R9 is connected to the first detection terminal ADC2 of the micro control module 30 and the common connection terminal of the duty cycle module 40.

[0041] Specifically, the first atomization control unit 21 is connected to the first airflow detection unit 11. One end of the first electronic cigarette atomizer is connected to the first atomization control unit 21 through the first negative pad H-1, and the other end of the first electronic cigarette atomizer is connected to the common connection end of the duty cycle module 40 and the first detection end ADC2 of the microcontrol module 30 through the positive pad H+1. The second atomization control unit 22 is connected to the second airflow detection unit 12. One end of the second electronic cigarette atomizer is connected to the second atomization control unit 22 through the second negative pad H-2, and the other end of the second electronic cigarette atomizer is connected to the common connection end of the duty cycle module 40 and the first detection end ADC2 of the microcontrol module 30 through the positive pad H+1. That is, the common connection end of the first electronic cigarette atomizer and the second electronic cigarette atomizer is welded to the positive pad and connected to the duty cycle module 40. The first field-effect transistor Q1 and the second field-effect transistor Q2 in the first atomization control unit 21 and the second atomization control unit 22 are N-channel field-effect transistors. When the gate of the first field-effect transistor Q1 or the gate of the second field-effect transistor Q2 receives a smoking state signal, the first field-effect transistor Q1 or the second field-effect transistor Q2 is controlled to conduct. Then, one end of the first electronic cigarette atomizer or the second electronic cigarette atomizer in the corresponding cartridge path is grounded through the atomization control module 20, and the first electronic cigarette atomizer or the second electronic cigarette atomizer is powered on to work, so as to convert electrical energy into heat energy at the moment of smoking, heating the e-liquid in the cartridge to generate smoke. When the user stops smoking, the first detection end ADC2 of the microcontrol module 30 is pulled up to a high level by the ninth resistor R9. When the user is smoking, the electronic cigarette atomizer in any cartridge path is powered on to work and divides the power supply voltage B+, so that the voltage value at the first detection end ADC2 of the main control chip U3 jumps from a high level, and then the main control chip U3 can recognize that the electronic cigarette atomizer is in a working state and recognize that the user is smoking at the current moment.

[0042] Further, as Figure 8As shown, the micro-control module 30 includes a main control chip U3. The first detection terminal ADC2 of the main control chip U3 is connected to the common connection terminal of the atomization control module 20 and the duty cycle module 40, and is used to identify the working state of the electronic cigarette atomizer and detect the working state signal when the electronic cigarette atomizer is in the working state. The first control terminal PWM CON1 of the main control chip U3 is connected to the duty cycle module 40, and generates a duty cycle control signal according to the magnitude of the working state signal when the electronic cigarette atomizer is in the working state. The duty cycle control signal is a Pulse Width Modulation (PWM) signal. The model of the main control chip U3 is MS32C001-C. Other micro-control chips that can be used for detecting the smoking state and working state of the electronic cigarette and controlling can also be selected, which is not limited here. In a further implementation manner of some preferred embodiments of the present invention, the first detection terminal ADC2 of the main control chip U3 can be connected to a current-limiting voltage-dividing resistor R10. Specifically, one end of the current-limiting voltage-dividing resistor R10 is connected to the first detection terminal ADC2 of the main control chip U3, and the other end is connected to the common connection terminal of the atomization control module 20 and the duty cycle module 40 to prevent external abnormal voltage or current from directly impacting the main control chip U3. When the user is smoking, the electronic cigarette atomizer in any cartridge path is powered on to work and divides the power supply voltage B+, causing the voltage value at the first detection terminal ADC2 of the main control chip U3 to jump. Then, the main control chip U3 can identify that the electronic cigarette atomizer is in the working state and recognize that the user is smoking at the current moment. At this time, the detected voltage at the first detection terminal ADC2 of the main control chip U3 is the working voltage of the first electronic cigarette atomizer or the second electronic cigarette atomizer in the corresponding cartridge path. The main control chip U3 detects the working voltage value of the electronic cigarette atomizer in real time through the detected voltage at the first detection terminal ADC2, and controls the duty cycle of the duty cycle control signal output to the duty cycle module 40 to dynamically adjust the working voltage of the first electronic cigarette atomizer or the second electronic cigarette atomizer, and further adjust the working power of the electronic cigarette atomizer.

[0043] Further, the duty cycle module 40 includes: a third field effect transistor Q3, a seventh resistor R7, and an eighth resistor R8; the source electrode of the third field effect transistor Q3 is connected to the power supply voltage B+, the gate electrode of the third field effect transistor Q3 is connected to one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected to the micro-control module 30, and the drain electrode of the third field effect transistor Q3 is connected to the atomization control module 20; one end of the seventh resistor R7 is connected to the source electrode of the third field effect transistor Q3, and the other end of the seventh resistor R7 is connected to the gate electrode of the third field effect transistor Q3.

[0044] Among them, the third field-effect transistor Q3 is a P-channel field-effect transistor. When the first control terminal PWMCON1 of the micro-control module 30 outputs a low-level signal, the source and drain of the third field-effect transistor Q3 are turned on, and the power supply voltage B+ supplies power to the first electronic cigarette atomizer or the second electronic cigarette atomizer at the atomization control module 20 through the third field-effect transistor Q3 for operation. When the first control terminal PWM CON1 of the micro-control module 30 outputs a high level, the source and drain of the third field-effect transistor Q3 are turned off. Therefore, the micro-control module 30 can drive the switch of the third field-effect transistor Q3 by controlling the duty cycle control signal output at the first control terminal PWM CON1, thereby adjusting the working voltage of the electronic cigarette atomizer in the subsequent circuit, adjusting the working power of the electronic cigarette atomizer, and further adjusting the amount of smoke generated by the electronic cigarette and the taste of use.

[0045] Specifically, the working principle of the dual-cartridge control circuit in the present invention is as follows: The tenth pin of the main control chip U3 of the micro control module 30 is the first control end PWM CON1, and the seventh pin of the main control chip U3 is the first detection end. The first detection end ADC2 of the main control chip U3 is used to identify the voltage value on the first electronic cigarette atomizer or the second electronic cigarette atomizer at the current moment. The first control end PWM CON1 of the main control chip U3 is used to control the conduction or cut-off of the first electronic cigarette atomizer or the second electronic cigarette atomizer in the smoking state, thereby controlling the working state of the first electronic cigarette atomizer or the second electronic cigarette atomizer, and taking the voltage value in the working state of the first electronic cigarette atomizer or the second electronic cigarette atomizer as a smoking signal. The two ends of the first electronic cigarette atomizer are respectively connected to the positive electrode pad H+1 and the first negative electrode pad H-1 in the first atomization controller, and the two ends of the second electronic cigarette atomizer are respectively connected to the positive electrode pad H+1 and the second negative electrode pad H-2. The atomizer can be equivalent to a load. When the user is not smoking, the atomization control modules 20 in the double cartridge path are all turned off, and the first detection end ADC2 of the main control chip U3 is pulled high to a high level by the ninth resistor R9. In a further implementation manner of some preferred embodiments of the present invention, the resistance value of the ninth resistor R9 is 1 MΩ. When smoking, the capacitance value of the airflow sensor in the corresponding cartridge path changes with the gas flow rate and is converted into the level high and low output at the output end of the airflow detection chip, and the level high and low is the smoking state signal. When the user smokes, the smoking state signal is a high level, and one of the first field effect transistor Q1 in the first airflow detection unit 11 or the second field effect transistor Q2 in the second airflow detection unit 12 conducts correspondingly. Then, the ninth resistor R9 and the atomizer form a voltage division for the power supply voltage B+, and the voltage value detected at the first detection end ADC2 of the main control chip U3 jumps. Then, the main control chip U3 recognizes the user's smoking signal, and the first control end PWM CON1 of the main control chip U3 generates a duty cycle control signal to control the conduction of the first field effect transistor Q1 or the second field effect transistor Q2, so that the electronic cigarette atomizer generates heat to produce the smoke for smoking. At this time, the first detection end is reused to identify the voltage value on the electronic cigarette atomizer for characterizing the working state signal, and the working power of the electronic cigarette is controlled by adjusting the duty cycle of the first control end PWM CON1.

[0046] When the user temporarily stops smoking and there is no airflow passing through the airflow sensors in the dual-cartridge passage, the first field-effect transistor Q1 of the first atomization control unit 21 and the second field-effect transistor Q2 of the second atomization control unit 22 are directly turned off, and the electronic cigarette atomizer stops working. At this time, when the first control terminal PWM CON1 of the main control chip U3 outputs a high level to turn off the third field-effect transistor Q3, the electrical measurement voltage at the first detection terminal ADC2 of the main control chip U3 is pulled up to the power supply voltage B+ again by the ninth resistor R9. When the main control chip U3 detects that the voltage at the first detection terminal is the power supply voltage B+, it can recognize that there is no smoking signal at the current moment and the user has stopped smoking. Otherwise, since one of the first field-effect transistor Q1 or the second field-effect transistor Q2 remains conducting during smoking, at this time, when the first control terminal PWM CON1 of the main control chip U3 outputs a high level to turn off the third field-effect transistor Q3, the voltage at the first detection terminal ADC2 of the main control chip U3 remains low due to the voltage division of the ninth resistor R9 and the atomizer, so as to realize the control of the dual-cartridge control circuit through the two I / O serial ports of the first detection terminal ADC2 and the first control terminal PWM CON1 of the main control chip U3, saving I / O serial port resources.

[0047] Based on the same inventive concept, the present invention also discloses an electronic cigarette, which includes an electronic cigarette atomizer, a battery module, and the dual-cartridge control circuit as described above. The electronic cigarette atomizer is connected to the atomization control module, and the battery module is connected to the duty cycle module. The battery module is used to supply power to the dual-cartridge control circuit. The dual-cartridge control circuit is specifically as described in the embodiment of a dual-cartridge control circuit above and will not be elaborated here.

[0048] In summary, for the dual-cartridge control circuit and the electronic cigarette provided by the present invention, by reusing the I / O serial port of the micro-control module in the circuit to identify the working state of the electronic cigarette atomizer, and by identifying the working state of the electronic cigarette atomizer to recognize whether the user is smoking; and when the electronic cigarette atomizer is in the working state, it is reused to detect the magnitude of the working state signal to realize the working power control of the electronic cigarette atomizer, reducing the I / O serial port resources consumed by the dual-cartridge control circuit and effectively reducing the production cost. Further, the present invention simplifies the circuit by sharing the duty cycle circuits of the two cartridge passages in the dual-cartridge control circuit, reducing the electronic components required for the dual-cartridge control circuit and the space occupied on the PCB board.

[0049] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A dual cartridge control circuit, connected to an electronic cigarette atomizer, characterized in that, Comprising: An air flow detection module, an atomization control module, a micro control module, and a duty cycle module; wherein, The air flow detection module is used to detect the gas flow rate and generate a smoking state signal; The atomization control module is connected to the air flow detection module, and is used to be connected to an electronic cigarette atomizer and control the working state of the electronic cigarette atomizer according to the smoking state signal. The working state includes a working state or a working stop state, and a working state signal is generated when the electronic cigarette atomizer is in the working state; The first detection end of the micro control module is connected to the duty cycle module, and is connected to the atomization control module through the electronic cigarette atomizer. The first control end of the micro control module is connected to the duty cycle module. The first detection end of the micro control module is used to identify the working state of the electronic cigarette atomizer, and detect the working state signal when the electronic cigarette atomizer is in the working state; The first control end of the micro control module generates a duty cycle control signal according to the magnitude of the working state signal when the electronic cigarette atomizer is working; One end of the duty cycle module is connected to the power supply voltage, and the other end of the duty cycle module is connected to the atomization control module. The duty cycle module is used to collect a duty cycle signal and control the working power of the electronic cigarette atomizer according to the magnitude of the duty cycle control signal.

2. The dual cartridge control circuit according to claim 1, wherein It further includes a transient suppression module. The transient suppression module is connected to the common connection end of the duty cycle module and the atomization control module, and is used to suppress transient voltage.

3. The dual-cartridge control circuit according to claim 1, characterized in that, The air flow detection module includes: a first air flow detection unit and a second air flow detection unit; The first air flow detection unit and the second air flow detection unit are respectively connected to the atomization control module; The first air flow detection unit includes: a first resistor, a first capacitor, a first air flow detection chip, and a first air flow sensor. One end of the first resistor is connected to the power supply voltage, and the other end of the first resistor is connected to the power supply voltage terminal of the first air flow detection chip. One end of the first capacitor is connected to the common connection end of the first resistor and the first air flow detection chip, and the other end of the first capacitor is grounded; The input end of the first air flow detection chip is connected to one end of the first air flow sensor, and the output end of the first air flow detection chip is connected to the atomization control module; The other end of the first air flow sensor is grounded to the grounding terminal of the first air flow detection chip; The second air flow detection unit includes: a second resistor, a second capacitor, a second air flow detection chip, and a second air flow sensor. One end of the second resistor is connected to the power supply voltage, and the other end of the second resistor is connected to the power supply voltage terminal of the second air flow detection chip. One end of the second capacitor is connected to the common connection end of the second resistor and the second air flow detection chip, and the other end of the second capacitor is grounded; The input end of the second air flow detection chip is connected to one end of the second air flow sensor, and the output end of the second air flow detection chip is connected to the atomization control module; The other end of the second air flow sensor is grounded to the grounding terminal of the second air flow detection chip.

4. The double cartridge control circuit according to claim 3, wherein The atomization control module includes a first atomization control unit and a second atomization control unit, and the electronic cigarette atomizer includes a first electronic cigarette atomizer and a second electronic cigarette atomizer; the first atomization control unit is respectively connected to the first air flow detection unit and the first electronic cigarette atomizer, and the second atomization control unit is respectively connected to the second air flow detection unit and the second electronic cigarette atomizer; The first atomization control unit includes: a third resistor, a fourth resistor, and a first field effect transistor; one end of the third resistor is connected to the first air flow detection unit, the other end of the third resistor is connected to the gate of the first field effect transistor, the drain of the first field effect transistor is connected to the first electronic cigarette atomizer, the source of the first field effect transistor is grounded, one end of the fourth resistor is connected to the gate of the first field effect transistor, and the other end of the fourth resistor is connected to the source of the first field effect transistor; The second atomization control unit includes: a fifth resistor, a sixth resistor, and a second field effect transistor; one end of the fifth resistor is connected to the second air flow detection unit, the other end of the fifth resistor is connected to the gate of the second field effect transistor, the drain of the second field effect transistor is connected to the second electronic cigarette atomizer, the source of the second field effect transistor is grounded, one end of the fourth resistor is connected to the gate of the second field effect transistor, and the other end of the fourth resistor is connected to the source of the second field effect transistor.

5. The double e-cigarette cartridge control circuit according to claim 1, characterized in that The micro control module includes a main control chip, and the first detection end of the main control chip is connected to the common connection end of the atomization control module and the duty cycle module, for identifying the working state of the electronic cigarette atomizer and detecting the working state signal when the electronic cigarette atomizer is in the working state; the first control end of the main control chip is connected to the duty cycle module, and generates a duty cycle control signal according to the magnitude of the working state signal when the electronic cigarette atomizer is in the working state.

6. The dual cartridge control circuit according to claim 1, wherein The duty cycle module includes: a third field effect transistor, a seventh resistor, and an eighth resistor; the source of the third field effect transistor is connected to the power supply voltage, the gate of the third field effect transistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to the micro control module, and the drain of the third field effect transistor is connected to the atomization control module; one end of the seventh resistor is connected to the source of the third field effect transistor, and the other end of the seventh resistor is connected to the gate of the third field effect transistor.

7. The double cartridge control circuit according to claim 4, characterized in that The atomization control module further includes a ninth resistor, one end of the ninth resistor is connected to the power supply voltage, and the other end of the ninth resistor is connected to the first detection end of the micro control module and the common connection end of the duty cycle module.

8. The dual-cartridge control circuit according to claim 4, wherein, The first field effect transistor or the second field effect transistor is an N-channel field effect transistor.

9. The dual cartridge control circuit according to claim 2, wherein, The transient suppression module includes a bidirectional clamping diode, one end of the bidirectional clamping diode is connected to the common connection end of the atomization control module and the duty cycle module, and the other end of the bidirectional clamping diode is grounded.

10. An electronic cigarette, characterized in that, It includes an electronic cigarette atomizer, a battery module, and a dual-cartridge control circuit as described in any one of claims 1-9. The electronic cigarette atomizer is connected to the atomization control module, and the battery module is connected to the duty cycle module. The battery module is used to supply power to the dual-cartridge control circuit.

Images