High-frequency chopping output control circuit for electronic cigarette

Abstract

The utility model provides a high-frequency chopping output control circuit for an electronic cigarette, which is characterized in that the output end of a charging circuit is in charging connection with a power supply, and the output end of the power supply is in power supply connection with an electronic cigarette gradual wave output main control circuit and a tobacco tar atomization control circuit; the output end of the microphone switch is connected with the input end of the electronic cigarette gradual wave output main control circuit, the output end of the electronic cigarette gradual wave output main control circuit is connected with the input end of the tobacco tar atomization control circuit, and the output end of the tobacco tar atomization control circuit is in power supply connection with an atomizer in an electronic cigarette cartridge. The output end of the electronic cigarette gradual wave output main control circuit is further connected with a display screen, and a main control chip U2 capable of outputting gradual wave control signals is arranged in the electronic cigarette gradual wave output main control circuit. The beneficial effects of the utility model are that the chopping output frequency of the main control chip U2 exceeding 20KHz does not make the main control circuit board vibrate to generate noise which can be heard by human ears.

Description

Technical Field

[0001] This utility model relates to the field of control circuit technology, specifically to a high-frequency chopper output control circuit for electronic cigarettes. Background Technology

[0002] Electronic cigarettes are electronic products that mimic traditional cigarettes, possessing the same appearance, smoke, taste, and feel, and even offering a wider variety of flavors than regular cigarettes. They work by atomizing nicotine and other substances into vapor for users to inhale. Generally, electronic cigarettes consist of three main parts: a cartridge containing the nicotine solution, an vaporizer, and a battery. The atomizer, powered by the battery, transforms the liquid nicotine in the cartridge into vapor, giving the user a similar sensation to smoking, allowing them to "exhale clouds of smoke."

[0003] Currently, most e-cigarettes on the market consist of a cartridge and the main body. The cartridge typically comprises a non-removable e-liquid tank and an atomizer. The e-liquid in the tank is atomized by the atomizer for the user to inhale. There are currently two main atomization methods: one is heat atomization, which uses a heating coil and a heating mesh to heat and atomize the e-liquid in the tank for inhalation; the other is ultrasonic atomization, where the e-liquid is ultrasonically atomized by the cartridge. Regardless of the atomization method, the atomizer in the cartridge needs to be powered, and the main body of the e-cigarette must contain a main control circuit board and a power supply.

[0004] In existing technologies, due to limitations in form and size, the internal main control circuit board and power supply of e-cigarettes are relatively small, resulting in limited output power. Furthermore, to control costs, current e-cigarette atomizers primarily use battery voltage chopping for power supply. This means the battery voltage powers the atomizer via a MOSFET switch, with different duty cycles for different power outputs to control the e-cigarette's power. However, because the MOSFET switch operates at a relatively low frequency (typically 50-300Hz), the main control circuit board is prone to vibration and resonance with the e-cigarette casing, producing audible noise that can mislead users into believing there is an internal malfunction, leading to a poor user experience. Utility Model Content

[0005] To address the problems in the prior art, this utility model provides a high-frequency chopper output control circuit for electronic cigarettes. By incorporating a charging circuit, a power supply, a main control circuit for the electronic cigarette's gradual output, an e-liquid atomization control circuit, and a microphone switch within the high-frequency chopper output control circuit for electronic cigarettes, the chopper output frequency for controlling the output power can be significantly increased. The chopper output frequency of the main control chip U2, exceeding 20kHz, will not cause the main control circuit board to vibrate and generate audible noise, thereby greatly improving the user experience. This solves the problem in the prior art where electronic cigarettes using MOS transistor switches have low chopper frequencies that easily generate noise, resulting in a poor user experience.

[0006] This utility model provides a high-frequency chopper output control circuit for electronic cigarettes, including a charging circuit, a power supply, an electronic cigarette gradual output main control circuit, an e-liquid atomization control circuit, and a microphone switch. The output terminal of the charging circuit is connected to the power supply for charging. The output terminal of the power supply is connected to the electronic cigarette gradual output main control circuit and the e-liquid atomization control circuit for power supply. The output terminal of the microphone switch is connected to the input terminal of the electronic cigarette gradual output main control circuit. The output terminal of the electronic cigarette gradual output main control circuit is connected to the input terminal of the e-liquid atomization control circuit. The output terminal of the e-liquid atomization control circuit is connected to the atomizer in the electronic cigarette cartridge for power supply. The output terminal of the electronic cigarette gradual output main control circuit is also connected to a display screen. The electronic cigarette gradual output main control circuit is equipped with a main control chip U2 capable of outputting gradual control signals. The electronic cigarette gradual output main control circuit can control the output power of the e-liquid atomization control circuit to the atomizer in the electronic cigarette cartridge according to the trigger information of the microphone switch.

[0007] This utility model is further improved by including a capacitor C15 in the main control circuit for the electronic cigarette's gradual output, and a main control chip U2 with 20 pins. Pin 6 of the main control chip U2 is connected to one end of the capacitor C15 and the output terminal of the power supply. Pin 19 of the main control chip U2 is connected to the input terminal of the e-liquid atomization control circuit. Pin 20 of the main control chip U2 is connected to the output terminal of the microphone switch. Pins 16, 17, and 18 of the main control chip U2 are connected to the input terminal of the display screen.

[0008] This utility model is further improved by including a field-effect transistor (FET) Q4, a field-effect transistor (FET) Q5, a diode D2, a resistor R20, and a resistor R21 in the e-liquid atomization control circuit. The source of the FET Q5 is connected to the output terminal of the power supply and one end of the resistor R20. The gate of the FET Q5 is connected to one end of the resistor R21. The drain of the FET Q5 is connected to the negative terminal of the diode D2 and the power supply of the atomizer in the e-cigarette cartridge. The other end of the resistor R20 is connected to the other end of the resistor R21 and the drain of the FET Q4. The gate of the FET Q4 is connected to pin 19 of the main control chip U2. The source of the FET Q4 and the positive terminal of the diode D2 are grounded.

[0009] This utility model is further improved by including a voltage regulator chip U1, an inductor L1, a diode D1, and a resistor R1 in the charging circuit. The voltage regulator chip U1 has 10 pins. The first pin of the voltage regulator chip U1 is connected to a 5V DC constant voltage source. The eighth pin of the voltage regulator chip U1 is connected to one end of the inductor L1. The other end of the inductor L1 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the cathode of the diode D1, the sixth pin of the main control chip U2, and the source of the field-effect transistor Q5. The anode of the diode D1 and the sixth pin of the voltage regulator chip U1 are grounded.

[0010] In a further improvement to this invention, the main control chip U2 can be of model QFN / CMS32L032GE20NB.

[0011] In a further improvement to this invention, the voltage regulator chip U1 can be of model LP4030QVF-435 / TDFN-10.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: It provides a high-frequency chopper output control circuit for electronic cigarettes. By setting up a charging circuit, a power supply, an electronic cigarette gradual output main control circuit, an e-liquid atomization control circuit, and a microphone switch in the high-frequency chopper output control circuit for electronic cigarettes, the electronic cigarette gradual output main control circuit is equipped with a main control chip U2 that can output gradual control signals. The electronic cigarette gradual output main control circuit can control the output power of the atomizer in the electronic cigarette cartridge by the e-liquid atomization control circuit according to the trigger information of the microphone switch. It can significantly improve the chopper output frequency for controlling the output power. The chopper output frequency of the main control chip U2, which exceeds 20KHz, will not cause the main control circuit board to vibrate and produce noise that can be heard by the human ear, thereby greatly improving the user experience. It solves the problem that the chopper frequency of the existing electronic cigarette using MOS tube switch output is low and easily produces noise, resulting in a poor user experience. Attached Figure Description

[0013] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a high-frequency chopper output control circuit for electronic cigarettes according to the present invention.

[0015] Figure 2 This is a circuit diagram of the main control circuit for the electronic cigarette's progressive output according to this utility model.

[0016] Figure 3 This is a circuit diagram of the e-liquid atomization control circuit of this utility model;

[0017] Figure 4 The circuit diagram is for the power supply of this utility model. Detailed Implementation

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] like Figures 1-4As shown, this utility model provides a high-frequency chopper output control circuit for electronic cigarettes, including a charging circuit, a power supply, an electronic cigarette gradual output main control circuit, an e-liquid atomization control circuit, and a microphone switch. The output terminal of the charging circuit is connected to the power supply for charging. The output terminal of the power supply is connected to the electronic cigarette gradual output main control circuit and the e-liquid atomization control circuit for power supply. The output terminal of the microphone switch is connected to the input terminal of the electronic cigarette gradual output main control circuit. The output terminal of the electronic cigarette gradual output main control circuit is connected to the input terminal of the e-liquid atomization control circuit. The output terminal of the e-liquid atomization control circuit is connected to the atomizer inside the electronic cigarette cartridge for power supply. The output terminal of the electronic cigarette gradual output main control circuit also... The electronic cigarette has a display screen and a main control chip U2 that can output the wavy output main control circuit. The main control chip U2 can be a QFN / CMS32L032GE20NB. The electronic cigarette wavy output main control circuit also has a capacitor C15. The main control chip U2 has 20 pins. Pin 6 of the main control chip U2 is connected to one end of capacitor C15 and the output terminal of the power supply. Pin 19 of the main control chip U2 is connected to the input terminal of the e-liquid atomization control circuit. Pin 20 of the main control chip U2 is connected to the output terminal of the microphone switch. Pins 16, 17, and 18 of the main control chip U2 are connected to the input terminal of the display screen. In this embodiment, the main control circuit for the electronic cigarette's PWM output can control the output power of the atomizer in the e-liquid atomization control circuit according to the trigger information of the microphone switch. That is, the main control chip U2 can output a PWM signal to control the power supplied to the atomizer by the e-liquid atomization control circuit. After the atomizer is powered, it begins atomization. This can significantly increase the chopping output frequency for controlling the output power. The chopping output frequency of the main control chip U2, which exceeds 20KHz, will not cause the main control circuit board to vibrate and produce noise that can be heard by the human ear, thereby greatly improving the user experience. Furthermore, the main control chip U2's chopper output frequency exceeding 20kHz allows the atomizer to function better. Operating at this frequency better balances the e-liquid penetration into the cotton and the evaporation of e-liquid in the resistance wire. For example, at 100Hz with a 70% duty cycle, the atomizer heating time is 7ms followed by a 3ms pause. Within the 7ms pause, sufficient e-liquid must be maintained in the atomizer; otherwise, the atomizer will burn the wicking cotton or the vapor temperature will be too high. During the 3ms pause, the wicking cotton should not be overloaded with e-liquid, otherwise it will accumulate and leak. At a 20kHz output frequency, with the same 70% output, the atomizer heating time is 35µs followed by a 15µs pause. This short output time allows for immediate replenishment of e-liquid.

[0022] like Figure 3As shown, the e-liquid atomization control circuit includes a field-effect transistor (FET) Q4, a field-effect transistor (FET) Q5, a diode D2, resistors R20 and R21. The source of FET Q5 is connected to the output terminal of the power supply and one end of resistor R20. The gate of FET Q5 is connected to one end of resistor R21. The drain of FET Q5 is connected to the negative terminal of diode D2 and the power supply to the atomizer in the e-cigarette cartridge. The other end of resistor R20 is connected to the other end of resistor R21 and the drain of FET Q4. The gate of FET Q4 is connected to pin 19 of the main control chip U2. The source of FET Q4 and the positive terminal of diode D2 are grounded. The charging circuit is a 5V DC constant voltage source. In this embodiment, the e-liquid atomization control circuit adjusts the power supply time to the atomizer in the e-cigarette cartridge based on the PWM signal (PWM signal) output from the main control circuit of the e-cigarette, thereby adjusting the output power.

[0023] like Figure 4 As shown, the charging circuit includes a voltage regulator chip U1, an inductor L1, a diode D1, and a resistor R1. The voltage regulator chip U1 can be an LP4030QVF-435 / TDFN-10 with 10 pins. Pin 1 of the voltage regulator chip U1 is connected to a 5V DC constant voltage source. Pin 8 of the voltage regulator chip U1 is connected to one end of the inductor L1, and the other end of the inductor L1 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the cathode of the diode D1, pin 6 of the main control chip U2, and the source of the field-effect transistor Q5. The anode of the diode D1 and pin 6 of the voltage regulator chip U1 are grounded. In this embodiment, the charging circuit is used to charge the power supply, which in turn powers the electronic cigarette's gradient output main control circuit and the e-liquid atomization control circuit.

[0024] As can be seen from the above, this utility model provides a high-frequency chopper output control circuit for electronic cigarettes. By incorporating a charging circuit, a power supply, a main control circuit for gradual output, an e-liquid atomization control circuit, and a microphone switch within the high-frequency chopper output control circuit for electronic cigarettes, and including a main control chip U2 capable of outputting gradual control signals within the main control circuit for gradual output, the main control circuit can control the output power of the atomizer in the electronic cigarette cartridge according to the trigger information from the microphone switch. This significantly increases the chopper output frequency for controlling the output power. The chopper output frequency of the main control chip U2, exceeding 20kHz, prevents the main control circuit board from vibrating and producing audible noise, thereby greatly improving the user experience. This solves the problem in the prior art where the chopper frequency of the MOS transistor switch output in electronic cigarettes is low, easily generating noise and resulting in a poor user experience.

[0025] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A high-frequency chopper output control circuit for electronic cigarettes, characterized in that: The device includes a charging circuit, a power supply, an electronic cigarette gradual output main control circuit, an e-liquid atomization control circuit, and a microphone switch. The output of the charging circuit is connected to the power supply for charging. The output of the power supply is connected to the electronic cigarette gradual output main control circuit and the e-liquid atomization control circuit for power supply. The output of the microphone switch is connected to the input of the electronic cigarette gradual output main control circuit. The output of the electronic cigarette gradual output main control circuit is connected to the input of the e-liquid atomization control circuit. The output of the e-liquid atomization control circuit is connected to the atomizer inside the electronic cigarette cartridge for power supply. The output of the electronic cigarette gradual output main control circuit also has a display screen. The electronic cigarette gradual output main control circuit has a main control chip U2 that can output gradual control signals. The electronic cigarette gradual output main control circuit can control the output power of the e-liquid atomization control circuit to the atomizer inside the electronic cigarette cartridge according to the trigger information of the microphone switch.

2. The high-frequency chopper output control circuit for electronic cigarettes according to claim 1, characterized in that: The main control circuit for the electronic cigarette's gradual output also includes a capacitor C15. The main control chip U2 has 20 pins. Pin 6 of the main control chip U2 is connected to one end of the capacitor C15 and the output terminal of the power supply. Pin 19 of the main control chip U2 is connected to the input terminal of the e-liquid atomization control circuit. Pin 20 of the main control chip U2 is connected to the output terminal of the microphone switch. Pins 16, 17, and 18 of the main control chip U2 are connected to the input terminal of the display screen.

3. The high-frequency chopper output control circuit for electronic cigarettes according to claim 2, characterized in that: The e-liquid atomization control circuit includes a field-effect transistor (FET) Q4, a field-effect transistor (FET) Q5, a diode D2, a resistor R20, and a resistor R21. The source of FET Q5 is connected to the output terminal of the power supply and one end of the resistor R20. The gate of FET Q5 is connected to one end of the resistor R21. The drain of FET Q5 is connected to the negative terminal of the diode D2 and the power supply to the atomizer in the e-cigarette cartridge. The other end of the resistor R20 is connected to the other end of the resistor R21 and the drain of FET Q4. The gate of FET Q4 is connected to pin 19 of the main control chip U2. The source of FET Q4 and the positive terminal of the diode D2 are grounded.

4. The high-frequency chopper output control circuit for electronic cigarettes according to claim 3, characterized in that: The charging circuit includes a voltage regulator chip U1, an inductor L1, a diode D1, and a resistor R1. The voltage regulator chip U1 has 10 pins. The first pin of the voltage regulator chip U1 is connected to a 5V DC constant voltage source. The eighth pin of the voltage regulator chip U1 is connected to one end of the inductor L1. The other end of the inductor L1 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the cathode of the diode D1, the sixth pin of the main control chip U2, and the source of the field-effect transistor Q5. The anode of the diode D1 and the sixth pin of the voltage regulator chip U1 are grounded.

5. The high-frequency chopper output control circuit for electronic cigarettes according to claim 4, characterized in that: The main control chip U2 can be of model QFN / CMS32L032GE20NB.

6. The high-frequency chopper output control circuit for electronic cigarettes according to claim 5, characterized in that: The voltage regulator chip U1 can be of model LP4030QVF-435 / TDFN-10.

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