CN210809290U

CN210809290U - Dry burning prevention system for electronic cigarette

Info

Publication number: CN210809290U
Application number: CN201921436509.5U
Authority: CN
Inventors: 栗明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-01
Filing date: 2019-09-01
Publication date: 2020-06-23
Anticipated expiration: 2029-09-01

Abstract

The utility model provides an electron cigarette prevents dry combustion method system, including power output control circuit, heater detection circuitry, master module circuit, flexible circuit board circuit, the master module circuit respectively with flexible circuit board circuit, power output control circuit, heater detection circuitry electric connection, heater detection circuitry contains resistance R17, resistance R18, reference resistance R14, detection control end, reference resistance R14's one end is passed through resistance R17 connects and detects the low side, reference resistance R14's the other end passes through resistance R18 connects and detects high-end. The utility model discloses set up on electron cigarette mainboard circuit and connect in parallel a high sensitive resistance with heating circuit through the high sensitive resistance with heating circuit is parallelly connected, can detect this kind of weak current change, from this system can detect whether can dry combustion method.

Description

Dry burning prevention system for electronic cigarette

Technical Field

The utility model relates to an electron cigarette field especially relates to an electron cigarette prevents dry combustion method system.

Background

The electronic cigarette is an electronic product simulating a cigarette, and generally, cigarette liquid is atomized by an atomizer for a user to use, so that substances such as tar and the like harmful to the body are removed, and the harm to the human body is eliminated. The electronic cigarette has the characteristics of safety, convenience, health, environmental protection and the like to a certain extent, so the electronic cigarette is favored by consumers.

Electronic cigarette is in the use, and the tobacco tar can gradually consume, and when the tobacco tar tends to exhaust, the tobacco tar of parcel on the module that generates heat can become fewly, leads to the in-process module temperature that generates heat to be higher than normal operating temperature from this, produces the dry combustion method, brings the harmful substance of pungent smell and high temperature production from this, probably causes the injury to user's healthy, brings very not good taste sense smell sense simultaneously and experiences. In the prior art, the state of the heating wire is directly identified by a current and voltage sampling mode, and the error of the acquisition mode is influenced by parameters such as operational amplifier parameters, system voltage, sampling resistance and the like, so that the error is large.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model provides an electron cigarette prevents dry combustion method system utilizes high accuracy sampling resistance to read resistance both ends ADC conversion value and then obtains the heater state for the error is reduced to only relevant with sampling resistance, and therefore the degree of accuracy is gathered to this kind of mode and the uniformity is better.

In order to achieve the above object, the utility model provides a following technical scheme: an electronic cigarette dry-burning prevention system comprises a power output control circuit, a heating wire detection circuit, a main control module circuit and a flexible circuit board circuit, wherein the main control module circuit is electrically connected with the flexible circuit board circuit, the power output control circuit and the heating wire detection circuit respectively, the heating wire detection circuit comprises a resistor R17, a resistor R18, a reference resistor R14 and a detection control end, one end of the reference resistor R14 is connected with a detection low end through the resistor R17, the other end of the reference resistor R14 is connected with a detection high end through the resistor R18, the power output control circuit comprises a capacitor C12, a resistor R23, a PMOS switch, a heating wire and an output control end, a source S of the PMOS switch is connected with the output control end through the resistor R13, a grid G of the PMOS switch is connected with the output control end, a drain D of the PMOS switch is connected with an anode of the heating wire, the source S of the PMOS switch is connected with the resistor R23 and the capacitor C12 and then is grounded, the anode of the heating wire is connected with the reference resistor R14, and the cathode of the heating wire is grounded.

Further, still include LED control chip and motor circuit, LED control chip and motor circuit and main control module circuit electric connection, LED control chip ' S pin CA 1-pin CA9, pin CB 1-pin CB9 connect LED lamp pearl respectively, ground connection behind pin AGCIN series capacitance C6, pin SDA, pin SCL, pin SDB connect the terminal row, pin AD, pin VSS ground connection, motor cathode and the one end of resistance R10 are connected to motor circuit ' S zener diode D6 ' S positive pole, and the other end of resistance R10 connects the drain D of field effect transistor, the grid G of field effect transistor connects resistance R11 and the one end of resistance R12, and the other end of resistance R12 and the source S ground connection of field effect transistor.

Has the advantages that: the utility model discloses set up on electron cigarette mainboard circuit and connect a high sensitive resistance with heating circuit in parallel, because the major constituent of the module that generates heat is the metal, the resistance of metal can produce small change along with the temperature, and the change of resistance can lead to the weak change of electric current in the circuit, through the high sensitive resistance parallelly connected with heating circuit, can detect this kind of weak current change, from this system can detect whether can dry combustion method.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a heater detecting circuit.

Fig. 2 is a power output control circuit.

Fig. 3 is a circuit of the main control module.

Fig. 4 is an LED control chip.

Fig. 5 is a motor circuit.

Fig. 6 is a flexible circuit board circuit.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "axial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-6, the utility model provides an electron cigarette prevents dry combustion method system, including power output control circuit, heater detection circuitry, master control module circuit, flexible circuit board circuit, the master control module circuit respectively with flexible circuit board circuit, power output control circuit, heater detection circuitry electric connection, heater detection circuitry contains resistance R17, resistance R18, reference resistance R14, detection control end, reference resistance R14 is used for detecting the benchmark of heater resistance size and refers to. One end of the reference resistor R14 is connected with a detection low end through the resistor R17, the detection low end is a low end detection position in the heating wire detection circuit, and the low end voltage value is detected and transmitted to the main control module circuit. The other end of the reference resistor R14 is connected with a detection high end through the resistor R18, the detection high end is a high end detection position in the heating wire detection circuit, and the detection high end detects a high end voltage value and transmits the high end voltage value to the main control module circuit. The detection control end is a power supply control end in the heating wire detection circuit. The power output control circuit comprises a capacitor C12, a resistor R23, a PMOS switch, a heating wire and an output control end, wherein the PMOS switch plays a role of an electronic switch. And the source S of the PMOS switch is connected with the output control end through the resistor R13, the output control end is a control port of the heating part, and the output is controlled through the main control module circuit. The output control end controls the PMOS switch to heat the heating wire according to the designed target temperature value; when the actual temperature of the heating wire is too high, the power supply time is reduced, and when the actual temperature of the heating wire is too low, the power supply time is prolonged, so that the output of a constant target temperature value is realized. The grid G of PMOS switch connects the output control end, the drain D of PMOS switch connects the positive pole of heater, the source S of PMOS switch is connected resistance R23 with electric capacity C12 back ground connection, the positive pole of heater is connected benchmark resistance R14, and the negative pole of heater is ground connection, the heater is the heater of electron smog tobacco tar, and it adopts the control by temperature change heater, and the resistance can change along with the change of temperature. Still include LED control chip and motor circuit, LED control chip and motor circuit and master control module circuit electric connection, LED lamp pearl is connected respectively to LED control chip's pin CA 1-pin CA9, pin CB 1-pin CB9, and ground connection behind the pin AGCIN series capacitance C6, pin SDA, pin SCL, pin SDB connect the terminal row, and pin AD, pin VSS ground connection can make the electron cigarette produce the light effect through LED control chip and LED lamp pearl. The positive pole of a voltage stabilizing diode D6 of the motor circuit is connected with the positive pole of the motor, the negative pole of the voltage stabilizing diode is connected with the negative pole of the motor and one end of a resistor R10, the other end of the resistor R10 is connected with a drain D of a field effect transistor, a grid G of the field effect transistor is connected with one ends of the resistor R11 and the resistor R12, the other end of the resistor R12 is grounded with a source S of the field effect transistor, and a vibration effect is generated through the motor circuit. The main principle of the utility model is to detect whether the output energy value of the heating wire when maintaining a certain temperature is less than the default, and then dry burning is reported to the police. Meanwhile, when the electronic cigarette is used and the tobacco tar tends to be exhausted, the heating circuit is cut off to prevent dry burning.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an electron cigarette prevents dry combustion method system which characterized in that: the heating wire detection circuit comprises a resistor R17, a resistor R18, a reference resistor R14 and a detection control end, one end of the reference resistor R14 is connected with a detection low end through the resistor R17, the other end of the reference resistor R14 is connected with a detection high end through the resistor R18, the power output control circuit comprises a capacitor C12, a resistor R23, a PMOS switch, a heating wire and an output control end, a source S of the PMOS switch is connected with the output control end through the resistor R13, a grid G of the PMOS switch is connected with the output control end, a drain D of the PMOS switch is connected with a positive electrode of the heating wire, the source S of the PMOS switch is connected with the resistor R23 and the capacitor C12 and then is grounded, the anode of the heating wire is connected with a reference resistor R14, and the cathode of the heating wire is grounded.

2. The electronic cigarette dry burning prevention system according to claim 1, characterized in that: still include LED control chip and motor circuit, LED control chip and motor circuit and main control module circuit electric connection, pin CA 1-pin CA9, pin CB 1-pin CB9 of LED control chip connect the LED lamp pearl respectively, ground connection behind pin AGCIN series capacitance C6, pin SDA, pin SCL, pin SDB connect the terminal row, pin AD, pin VSS ground connection, motor anode is connected to the positive pole of zener diode D6 of motor circuit, and the negative pole is connected the one end of motor negative pole and resistance R10, and the drain D of field effect transistor is connected to the other end of resistance R10, the grid G of field effect transistor connects the one end of resistance R11 and resistance R12, and the other end of resistance R12 and the source S ground connection of field effect transistor.